Offseason In Review: Seattle Mariners
The 2025 Mariners were a game away from the World Series. Their two-decade playoff drought and status as perennial runner-up increasingly feels like a thing of the past. They enter the 2026 season as the AL West favorite in projections at both FanGraphs and Baseball Prospectus after a winter that featured multiple upgrades.
Major League Free Agent Signings
- Josh Naylor, 1B: Five years, $92.5MM
- Rob Refsnyder, OF: One year, $6.25MM
- Andrew Knizner, C: One year, $1MM
Option Decisions
- Team declined $12MM mutual option on C Mitch Garver (paid $1MM buyout)
- Team exercised $7MM club option on RHP Andres Munoz
- INF Jorge Polanco declined $8MM player option
Trades and Waiver Claims
- Acquired INF/OF Brendan Donovan from Cardinals in three-team trade also involving Rays; Mariners sent SHP Jurrangelo Cijntje, OF Tai Peete, Competitive Balance pick (Round B) to Cardinals, 3B Ben Williamson to Rays
- Acquired LHP Jose A. Ferrer from Nationals in exchange for C Harry Ford, minor league RHP Isaac Lyon
- Acquired RHP Yosver Zulueta from Reds in exchange for minor league RHP Dusty Revis
- Acquired minor league LHP Robinson Ortiz from Dodgers in exchange for minor league RHP Tyler Gough
- Acquired minor league RHP Alex Hoppe from Red Sox in exchange for minor league C Luke Heyman
- Acquired RHP Cooper Criswell from Mets for cash
- Acquired C Jhonny Pereda from Twins for cash
- Acquired LHP Josh Simpson from Marlins for cash
- Acquired RHP Cole Wilcox from Rays for cash
- Claimed RHP Ryan Loutos off waivers from Nationals
Extensions
- None yet
Notable Minor League Signings
- Mitch Garver, Dane Dunning, Connor Joe, Casey Lawrence, Randy Dobnak, Guillo Zuñiga, Patrick Wisdom, Michael Rucker, Jhonathan Diaz, Brian O’Keefe, Jakson Reetz, Will Wilson, Brennen Davis
Notable Losses
- Eugenio Suarez, Ben Williamson, Harry Ford, Caleb Ferguson, Luke Jackson, Tayler Saucedo (non-tendered), Gregory Santos (non-tendered), Trent Thornton (non-tendered), Jackson Kowar (claimed by Twins)
When fans think of the Mariners, the dominant starting rotation is often the first thing that comes to mind. The 2025 season, Seattle’s best since 2000-02, played out in somewhat uncharacteristic fashion, however. The rotation was solid but not elite. Mariners starters barely cracked the top half of baseball in terms of ERA, due in part to injuries up and down the staff. Seattle’s bullpen ranked top-10 in ERA, however, and the lineup finished tenth or better in runs scored, home runs, on-base percentage, slugging percentage and wRC+. Cal Raleigh, the AL MVP runner-up, played a huge role in the Mariners’ offensive eruption, but the Seattle lineup was a strong unit top to bottom.
Seattle’s deadline acquisition of Josh Naylor from the D-backs played a big part in that. Naylor hit the ground running in the Emerald City and immediately looked at home, slashing .299/.341/.490 with nine homers in 210 plate appearances. The 5’10”, 235-pound Naylor even delighted baseball fans (not just Seattle fans) by somehow going 19-for-19 in stolen base attempts despite sitting in the third percentile of big leaguers in terms of average sprint speed, per Statcast. Naylor entered the season with 25 career steals in 598 games. He played 54 games as a Mariner.
President of baseball operations Jerry Dipoto made it known before season’s end that keeping Naylor was not just a priority for the Mariners but the offseason priority. Appearing on the MLB Trade Rumors podcast, Dipoto told host Darragh McDonald that Naylor was “as good as anybody that’s played in the last handful of years at hitting in this ballpark” while voicing a strong desire to keep the 28-year-old slugger.
True to his word, Dipoto wasted little time in making an aggressive push to keep his newly acquired first baseman. Naylor, who also raved late in the season about how much he loved playing in Seattle, was one of the first major free agents off the board, coming to terms on a five-year, $92.5MM deal two weeks after the World Series wrapped up.
Naylor’s deal is the largest contract the Mariners have given to a free-agent position player since Dipoto began running baseball operations for the Mariners more than a decade ago — and not just barely, but by a magnitude of nearly four times. Dipoto has been open about his desires to avoid building a roster through free agency, and his affinity for working the trade market is well known. That Naylor nearly quadrupled the $24MM guarantee paid to Mitch Garver underscores how strongly the Mariners felt about keeping him. Prior to the Naylor signing, Garver was the only free agent position player to sign a multi-year free agent deal with Seattle in ten years.
While Naylor was the priority, the Mariners remained open to re-signing veterans Jorge Polanco and Eugenio Suarez, both of whom hit in the middle of the lineup down the stretch and into the playoffs. Polanco was always deemed more likely, but the Mariners apparently balked at matching or topping the two-year, $40MM deal he received from the Mets. That $20MM average annual value was steeper than nearly any pundit or fan thought Polanco would command.
The veteran Polanco’s departure left the Mariners in a familiar position. As was the case the offseason prior, the M’s had openings at both second base and third base. Dipoto and GM Justin Hollander spent most of the 2024-25 offseason working the trade market to find an option at one or both positions before ultimately re-signing Polanco to one-year deal that turned out to be a raucous bargain.
For much of the current offseason, it looked as though things might play out similarly. The Mariners engaged with the Cardinals on Brendan Donovan early, but interest in the utilityman extraordinaire was robust. Dipoto and Hollander kept in touch with Suarez’s camp, were at least loosely involved in the market for star NPB third baseman Kazuma Okamoto, spoke to the D-backs repeatedly about Ketel Marte and inquired on the Cubs’ Nico Hoerner. There were surely other trade and free agent targets whose names didn’t become public.
Through it all, the Mariners were cited as one of the top suitors and front-runners for Donovan, who entered the offseason as a veritable lock to be traded by the rebuilding Cardinals. It may have taken longer than fans hoped, but the Mariners eventually got their man on Feb. 2, parting with top pitching prospect Jurrangelo Cijntje, outfield prospect Tai Peete, young third baseman Ben Williamson and a Round B Competitive Balance draft pick (No. 68 overall) in a three-team deal that brought Donovan their way. Seattle’s interest in the former Gold Glove winner dated back to last season, meaning the three-team swap capped off more than a yearlong pursuit of the versatile infielder/outfielder.
Donovan indeed feels like a perfect fit for the M’s. He’s a quality defender at either third base or second base, meaning the Mariners can see which of Cole Young and Colt Emerson stand out the most this spring. The hope is that Emerson is the team’s long-term third baseman — or perhaps shortstop, if J.P. Crawford departs in free agency next winter — and that Young is the second baseman of the future. Donovan’s ability to play either spot lets the Mariners take a flexible approach to their infield alignment. And if both players eventually force their way onto the roster, Donovan can split time between those two positions, the outfield corners and designated hitter.
While Seattle paid a steep price to acquire Donovan in terms of the talent they surrendered, they’re getting him for just $5.8MM this season and can control him through the 2027 campaign. It wouldn’t be a surprise if the two parties eventually talked extension. Donovan was open to a long-term deal in St. Louis even as the Cards embarked on a rebuild.
Time will tell whether he feels similarly about his new surroundings, but at the very least he doesn’t appear to be dead-set on testing free agency 18 months from now. Recent extensions for Tommy Edman and Ryan McMahon paid that pair of comparably aged infielders $70MM total; Donovan might command a bit more, but a five-year deal in that general range (beginning with next year’s final arbitration season) feels like something that could work for both sides, speculatively speaking.
Even if no extension comes to fruition, Donovan will be hitting at or near the top of a deep Mariners lineup for the next two seasons. He’s the sort of versatile, high-contact bat the Mariners coveted several years ago when trying to reshape their offensive identity after years of ranking at or near the top of the league in strikeouts. With Donovan (career 13.5% strikeout rate) and Naylor (career 16%) now helping to anchor the lineup, the M’s have a bit of a different feel than the all-or-nothing bunch to which we’d grown accustomed earlier this decade.
The Donovan trade may have been the Mariners “signature” trade of the offseason, but it wasn’t the only swap of consequence for Dipoto, Hollander & Co. One of the Mariners’ first moves post-Naylor was to address the lack of reliable left-handed relief in their bullpen, swinging a trade for Nationals southpaw Jose A. Ferrer. Many fans were shocked to see the Mariners part with top catching prospect Harry Ford to acquire a reliever, but Ford was blocked by Raleigh with no clear path to playing time in Seattle. That doesn’t mean he can be swapped out for any old bullpen arm, but what Ferrer lacks in name recognition he makes up for in extremely intriguing underlying numbers.
Ferrer’s 4.15 ERA over the past two seasons (4.48 in 2025) isn’t going to garner much attention. However, that mark came playing in front of a porous Nationals defense that rarely did the flamethrowing sinker specialist help. The 25-year-old Ferrer (26 next week) averages a blazing 97.7 mph on a sinker that’s helped him post a gargantuan 61% ground-ball rate dating back to 2024 — fifth highest in all of baseball (min. 100 innings pitched).
In 2025, Ferrer upped his strikeout rate from the prior year’s 19.4% to a nearly league-average 21.9%. His swinging-strike rate rose to a slightly above-average 11.5%. Ferrer has only walked 4.9% of his opponents the past two seasons. That blend of plus command and plus-plus ground-ball tendencies, coupled with even average bat-missing abilities (and a competent defense behind him) gives Ferrer immense breakout potential. Metrics like SIERA (2.97) and FIP (2.95) already feel he’s great, and the Mariners’ track record in coaxing breakouts from unheralded relievers (e.g. Paul Sewald, Gabe Speier, Drew Steckenrider, Justin Topa) shouldn’t be overlooked. Ferrer is controlled for four more seasons and has two minor league option years remaining. Adding him to a bullpen anchored by Andres Munoz and Matt Brash could make for a lethal trio.
Most of the remaining moves were more on the margins of the roster. Rob Refsnyder and his lifetime .281/.383/.443 line against lefties (.302/.399/.560 in 2025) gives manager Dan Wilson a big platoon bat to pair with lefty-swinging outfielder/designated hitter Dominic Canzone, who’s coming off a breakout .281/.358/.481 showing in 268 plate appearances. Canzone more than held his own against lefties, so he’ll still get some left-on-left looks, but all of his power was against righties. Only two of his 22 extra-base hits (one double, one homer) came versus southpaws.
Andrew Knizner was brought in on a moderately surprising big league deal to be the backup to Raleigh. He’s earning just $1MM, so it’s a minimal commitment if Knizner doesn’t pan out. He’s a career .211/.281/.316 hitter whose defensive marks have improved in a small sample over the past two seasons. Notably, he was one of the best catchers in Triple-A last year when it came to challenging pitches under the incoming ABS system, which could have factored into the decision. Catching depth in general was a priority though, as they also reunited with Mitch Garver on a minor league deal and picked up Jhonny Pereda from the Twins in a cash swap.
Assembling a deep collection of optionable arms also proved to be a priority this winter. The Mariners acquired a whopping six optionable young relievers via either small trades or waivers. The current big league bullpen doesn’t have much flexibility — Ferrer and Brash are the only optionable arms, and neither is being sent down anytime soon — so it’s possible something will shake loose later in camp with the Mariners moving on from an out of options arm like Casey Legumina. The Mariners added Yosver Zulueta, Josh Simpson, Cole Wilcox, Alex Hoppe and Robinson Ortiz via trade and claimed Ryan Loutos off waivers. They’ll have plenty of options to evaluate when injuries inevitably crop up among the more experienced members of the bullpen.
The starting pitching lacks that same level of depth, particularly after sixth starter Logan Evans suffered a UCL tear that’ll require season-ending surgery. The Mariners’ top quintet of Logan Gilbert, Bryan Woo, George Kirby, Luis Castillo and Bryce Miller is among the most talented in the game, but the top options behind him are now out-of-options swingman Cooper Criswell, former prospect Emerson Hancock (who’s struggled in the majors thus far) and non-roster veteran Dane Dunning. Finding an optionable rotation candidate or bringing in one more low-cost or non-roster veteran would arguably still be prudent, but even if they opt to do so, it’s not likely to be one of the top names available.
By and large, the Mariners’ heavy lifting is wrapped up. Naylor, Donovan and Ferrer are quality headline additions, but the M’s have done plenty of work to round out the margins of the roster with improved depth to position them for the rigors of a long season. They’ll head into 2026 as a popular pick to win their division at the very least, and better health from their top starters could make Seattle one of the favorites in the broader American League overall.
How would you grade the Mariners' offseason?
Mariners, Brendan White Agree To Minor League Deal
The Mariners are signing reliever Brendan White out of the independent ranks, according to an announcement from the Atlantic League’s Lancaster Stormers. White finished last season with the Stormers after being released from a minor league contract with the Tigers in July.
White, 27, pitched in the majors for Detroit a couple seasons ago. He made 33 appearances and tossed 40 2/3 innings of 5.09 ERA ball as a rookie in 2023. He struck out a quarter of batters faced against a league average 8.5% walk rate. He sat in the 94-95 mph range with his four-seam fastball while using a mid-80s breaking ball almost two-thirds of the time.
The right-hander lost most of the ’24 season to injury. Detroit non-tendered him at the end of the year but brought him back on a minor league contract. White had a rough return to Triple-A Toledo last season. His strikeout rate fell to 17% as opponents rocked him for more than seven earned runs per nine innings. He continued to struggle after landing with the Stormers, giving up six runs while handing out 10 free passes (six walks and four hit batters) across 9 2/3 innings.
White will look to put the down year behind him as he joins a new MLB organization for the first time in his career. He’ll presumably open the season at Triple-A Tacoma.
Mariners Were Reluctant To Discuss Cole Young In Ketel Marte Talks
Among players who were not traded this offseason, few found themselves in more rumors than Ketel Marte. Arizona general manager Mike Hazen maintained throughout the winter that a trade was unlikely and said last month that talks never got close to a deal. Nevertheless, the D-Backs took calls from various teams who had interest in their star second baseman.
The Mariners were among the clubs that checked in as they pursued a high-impact infielder. Seattle surely had some interest in Marte, who began his career in the organization before being traded to Arizona over the 2016-17 offseason. Adam Jude of The Seattle Times reports that conversations about bringing Marte back to the Pacific Northwest didn’t progress far. According to Jude, that’s at least in part because the M’s balked at including second-year infielder Cole Young in a deal.
That aligns with a December report from Jude’s Seattle Times colleague, Ryan Divish, that the Mariners were reluctant to trade off their major league roster. The M’s wound up landing their preferred target, Brendan Donovan, in a three-team trade with the Cardinals and Rays. It required them to part with one big leaguer, third baseman Ben Williamson. Williamson was a secondary piece in that deal, which was headlined by Double-A pitching prospect Jurrangelo Cijntje. A deal built around Young would have subtracted a higher-upside player than Williamson from the MLB team.
Donovan is a more versatile defensive player than Marte. He’s expected to kick over to third base to begin the season. That’ll open the path for Young to win the second base job. The 22-year-old struggled as a rookie, batting .211/.302/.305 with four home runs across 257 plate appearances. He showed an advanced plate approach but didn’t hit the ball hard enough consistently to do damage.
Young lost playing time down the stretch and was left off the playoff rosters. Jorge Polanco was the starting second baseman in October, while the M’s felt Leo Rivas provided a better contact-oriented infielder off the bench.
Jude’s reporting suggests the Mariners haven’t lost any faith in Young’s upside. The former first-round pick was an excellent hitter at every minor league stop. He’d posted a .277/.392/.461 line with more walks than strikeouts over 54 Triple-A games. Young still didn’t put up huge home run tallies, but he hit the ball harder with more consistent gap power against minor league pitching. Although he has exhausted his prospect eligibility, he remains one of the organization’s most promising young players. He’s under club control for six full seasons and would be a borderline candidate for Super Two eligibility over the 2027-28 offseason if he sticks on the MLB roster.
Mariners Notes: Garver, Arroyo, Miller
After the Mariners declined their end of Mitch Garver‘s $12MM mutual option last fall, Garver took his $1MM buyout and then sat through a “super slow offseason. Never really got any good offers or formal offers,” as the catcher told the Seattle Times’ Adam Jude. Garver’s long wait in free agency ended two days ago when he re-signed with the M’s on a minor league deal, and Garver credited his fellow backstop Cal Raleigh with helping get the ball rolling on the reunion.
Earlier this week, Garver said “Cal reached out and said, ‘Maybe you should try calling the Mariners.’ So we called Justin [Hollander, the Mariners’ GM]. Within 24 hours, we were able to work something out.” Reports from December indicated that Seattle had some interest in bringing Garver back, and though Andrew Knizner was signed to a one-year, $1MM guaranteed deal, Garver’s return gives the M’s some more depth behind the plate.
Raleigh made 38 starts at DH last season, as the Mariners wanted to give the slugger a break from catching duties while still keeping his power bat in the lineup. Since a fresh and productive Raleigh is critical to Seattle’s hopes, the team figures to use this same tactic again in 2026, opening the door for plenty of time for a backup catcher. It perhaps isn’t out of the question that both Garver and Knizner are on the 26-man roster, though the M’s are probably more likely to stick with Raleigh and one backup as the catching corps.
Elsewhere at the Mariners’ camp, Adam Divish of the Seattle Times writes that infield prospect Michael Arroyo will get some looks as a third baseman and left fielder once Arroyo returns from national team duty with Colombia during the World Baseball Classic. Arroyo has never played in the outfield as a pro, and played in a handful of games at the hot corner when playing with the Mariners’ Dominican Summer League team in 2022. Otherwise, Arroyo has played exclusively as a middle infielder, and was only a second baseman and DH in the minors in 2025.
Heading into 2026, Baseball Prospectus ranks Arroyo as the 36th-best minor leaguer in the sport, and The Athletic’s Keith Law (49th), ESPN’s Kiley McDaniel (62nd), and MLB Pipeline (67th) all have Arroyo within their preseason top-100 rankings. The consensus on Arroyo’s defense is that he could end up as a decent big league second baseman, though between offseason acquisition Brendan Donovan and a bunch of other infield prospects, it makes sense that the Mariners would want to expand Arroyo’s versatility.
2027 is probably the likeliest date for Arroyo’s Major League debut. He just turned 21 last November, and had a modest .255/.376/.341 slash line over 250 PA with Double-A Arkansas in 2025. Arroyo’s approach at the plate is well-regarded by scouts, but he’ll need some bigger numbers in the minors (and probably an injury or two ahead of him on the depth chart) to get himself on the radar for a big league call-up this year.
In a longer piece from Ryan Divish, Bryce Miller reported good health and a normal offseason routine in the wake of an injury-plagued 2025 season. Miller was limited to 18 starts and 90 1/3 innings in 2025 due to a pair of stints on the injured list, as Miller battled bone spurs in his throwing elbow. Rather than a surgical option, Miller received a cortisone shot and a PRP shot to help his recovery, and he finished his tough year on the high note of a 2.51 ERA over three starts and 14 1/3 innings during Seattle’s postseason run.
Following the season, Miller said he got a Synvisc injection, which is “like a gel, like a joint lubricant.” This allowed him to proceed as normal this winter, and he may be able to avoid surgery altogether.
“[Dr. Keith] Meister was like, ‘Don’t touch it [Miller’s elbow]. If it feels good, don’t touch it’,” Miller said. ” ‘Now that we know kind of how to help it, if you feel anything in the offseason or anything in Spring Training or anything during the year, just get another injection, to get back rolling again now that we know how to fix it.’ He advised against doing anything until I feel something and I haven’t felt anything.”
Miller is already up to 98mph in his live batting-practice sessions, and he has added 15 pounds of muscle over the offseason. Now entering his fourth MLB season, Miller looked like a breakout star when he had a 2.94 ERA over 180 1/3 innings with the Mariners in 2024, before his bone spurs hampered his progress last year.
Poll: Which Team Had The Best Offseason?
The offseason has more or less come to a close at this point. While a handful of players remain available in free agency and there’s always a chance of a surprise trade or two throughout Spring Training, the vast majority of the heavy lifting has been done. As Spring Training begins, it’s worth checking in on what teams around the league did this winter to see which club had the strongest offseason. A look at a few of the candidates:
Baltimore Orioles
After a disastrous 2025 season that saw the club fall to the basement of the American League, the Orioles have been very busy in their efforts to turn things around. A rotation that struggled to stay above water last year saw the return of Zach Eflin as well as the additions of both Shane Baz and Chris Bassitt. Those additions may not have included the front-of-the-rotation ace the Orioles were widely expected to pursue, but the club was aggressive elsewhere on the roster. Ryan Helsley was brought in to close while Felix Bautista is injured, and the club swung a deal for Taylor Ward to help round out their outfield. By far the biggest addition of the winter, however, was slugger Pete Alonso, who signed a five-year, $155MM contract. Alonso adds a legitimate 40-homer threat to the middle of a lineup that struggled to generate much offense outside of Gunnar Henderson last year and was heavily slanted toward lefty hitters.
Chicago Cubs
It’s rare that a team would be in this conversation after losing the offseason’s top-ranked free agent, but there’s a lot to like about the 2026 Cubs even after bidding farewell to Kyle Tucker. Alex Bregman, signed to a five-year, $175MM deal, can’t be expected to be the same offensive force as peak-level Tucker, but he makes up for that by helping to complete what’s arguably become the best defensive infield in baseball alongside Dansby Swanson, Nico Hoerner, and Michael Busch. The move pushes Matt Shaw into a utility role, where he can serve as protection against injury for the club while also potentially sharing time with fellow youngster Moises Ballesteros at DH. The addition of Bregman was complemented by the decision to swing a trade for high-upside righty Edward Cabrera in the rotation. That likely pushes swingman Colin Rea back into a bullpen that’s been rebuilt with Phil Maton, Hunter Harvey, and Hoby Milner after losing Brad Keller, Andrew Kittredge, and Drew Pomeranz back in November.
Los Angeles Dodgers
The Dodgers’ offseason hasn’t been an exceptionally busy one, but the few moves they wound up making could prove to be the most impactful of any team this winter. They kicked off their offseason by poaching star closer Edwin Diaz away from the Mets, but their biggest splash was the addition of Tucker to their outfield. Diaz and Tucker are both All-Stars with among the highest ceilings in the game at their respective positions. Adding both to an already star-studded roster, the Dodgers managed to address the 2025 team’s biggest weaknesses: a lackluster outfield and a leaky bullpen. They also extended Max Muncy on an affordable one-year deal and reunited with Kiké Hernandez and Evan Phillips. After back-to-back World Series championships, the Dodgers look even better headed into 2026 despite their relatively low volume of transactions.
New York Mets
While the Dodgers mostly kept their 2025 team intact for 2026 with just a few additions, the Mets went in the opposite direction with a complete roster overhaul. Out went Alonso, Diaz, Brandon Nimmo, and Jeff McNeil. Replacing them is a host of talent ranging from new staff ace Freddy Peralta to relievers Devin Williams and Luke Weaver on the pitching side, and a cluster of position players headlined by star infielder Bo Bichette. In addition to Bichette, who’ll move to third base alongside shortstop Francisco Lindor, the team brought in Marcus Semien to handle the keystone, Jorge Polanco to cover first base, and Luis Robert Jr. to work in center field. It’s a busy offseason that completely changed the look of the team that failed to make the playoffs last year, though it remains to be seen if this team will better support Lindor and Juan Soto in their pursuit of a World Series championship.
Toronto Blue Jays
The Blue Jays finished just shy of a World Series championship last year, and this winter they acted like a team that wanted to leave no stone unturned in their efforts to close the gap. A new-look rotation added Dylan Cease at the front and Cody Ponce at the back. A lineup that lost Bichette in free agency looked to make up for it by bringing in Kazuma Okamoto and Jesus Sanchez. Meanwhile, the team’s shaky bullpen upgraded from hard-throwing righty Seranthony Dominguez by bringing in ever-reliable soft-tosser Tyler Rogers. Missing out on both Bichette and Tucker takes some of the punch out of Toronto’s offseason, but adding Cease to a rotation that already includes Kevin Gausman, Shane Bieber, and Trey Yesavage should make the Jays significantly more threatening than they already were last year.
Other Options
Plenty of teams had offseasons worthy of praise aside from the five listed above. The Tigers managed to snag arguably the top pitcher available in lefty Framber Valdez on a short-term deal while also reuniting with future Hall of Famer and Detroit legend Justin Verlander, though failing to upgrade the lineup is surely disappointing for fans hoping to see the team make the most of Tarik Skubal‘s likely last year in town.
The Red Sox were very busy this winter as they brought in Sonny Gray, Johan Oviedo, Willson Contreras, and Caleb Durbin via the trade market while signing Ranger Suarez and Isiah Kiner-Falefa in free agency, but the team’s failure to reunite with Bregman casts a shadow over their busy winter.
The Astros got the rotation depth they coveted, signing NPB star Tatsuya Imai to a three-year deal with multiple opt-outs and acquiring righty Mike Burrows in a three-team trade that sent outfielder Jacob Melton to the Rays. They’re still too right-handed and have a glut of infielders that could still lead to one more big spring trade.
The Pirates were very active by their usual standards, overhauling the lineup to bring in Ryan O’Hearn, Marcell Ozuna, and Brandon Lowe among others. The Rangers came into the winter without much room to add but managed to come away with a solid bat (Nimmo) for the lineup and a big arm (MacKenzie Gore) for the rotation nonetheless. The Mariners kept Josh Naylor and added Brendan Donovan to the infield. The A’s added only complementary pieces (McNeil, Aaron Civale) in terms of external additions but deserve praise for their franchise-altering extensions of Tyler Soderstrom and Jacob Wilson.
On the flipside, the rebuilding Cardinals managed to shed significant portions of the Contreras, Gray and Nolan Arenado contracts and pulled in a nice return from the Mariners (and Rays) in the three-team Donovan trade.
What team do MLBTR’s readers think had the best offseason this winter? Have your say in the poll below:
Which team had the best offseason?
Mariners, Mitch Garver Agree To Minor League Deal
The Mariners and catcher Mitch Garver have agreed to a minor league deal, reports Jeff Passan of ESPN. The ISE Baseball client will arrive in camp tomorrow to undergo his physical and will be paid at a $2.25MM rate if he cracks the MLB roster, reports Daniel Kramer of MLB.com.
Garver, 35, returns to the club he has spent the past two years with. The Mariners signed him to a $24MM deal for the 2024 and 2025 seasons. At that time, Garver had the reputation of being injury prone but one of the league’s best offensive catchers when on the field. From 2018 to 2023, he only played 428 games over those six seasons but slashed .254/.343/.488 for a 126 wRC+. Among primary catchers with at least 40 plate appearances in that span, only Adley Rutschman and Will Smith barely outperformed him, with Rutschman having a 129 wRC+ and Smith 128.
The Mariners were hoping Garver could add a potent bat to the lineup via the designated hitter spot while also serving as Cal Raleigh‘s backup behind the plate. It didn’t really work out they had hoped. Over the past two years, Garver stepped to the plate 720 times for Seattle. He hit 24 home runs and drew walks at an 11.5% clip but struck out in 29.6% of his plate appearances, leading to a .187/.290/.341 batting line and 88 wRC+.
That production wasn’t disastrous, as catchers are usually about 10% below league average on the whole. For a backup catcher to be in that range isn’t too shabby in a vacuum but the Mariners don’t usually spend on free agent bats and were surely hoping for more, especially since his defense isn’t especially well rated. At the time of the Garver deal, that was actually the biggest guarantee given to a free agent hitter in the tenure of Jerry Dipoto, who started leading the front office in September of 2015. The recent signing of Josh Naylor has since broken that record.
Despite the underwhelming return on that investment, there’s little harm in trying again with this pact. Garver isn’t even guaranteed a roster spot at this point and presumably wouldn’t make a huge salary if he does eventually get a spot.
The M’s have Raleigh signed for years to come but the backup gig is somewhat open. The Mariners traded Harry Ford to the Nationals as part of the trade which brought reliever Jose A. Ferrer to Seattle. Andrew Knizner was signed to a one-year deal worth $1MM in December but doesn’t have the same ceiling as Garver. Jhonny Pereda is also on the 40-man roster but he has just 50 big league games under his belt and can still be optioned to the minors.
With Pereda likely ticketed for Triple-A, Garver will try to push Knizner for the backup job. If Garver doesn’t get it, the Mariners would presumably like him to head to Triple-A as non-roster depth, but he would have some say in the matter.
Garver is an Article XX(b) free agent, which means a player with six years of service time who finished the previous season on an MLB roster. Those players who sign minor league deals at least 10 days before Opening Day have a trio of opt-out dates under the collective bargaining agreement: five days before Opening Day, May 1, and June 1. If the M’s don’t commit to Garver as camp is winding down, he could look for better opportunities elsewhere.
Photo courtesy of Steven Bisig, Imagn Images
Mariners Acquire Josh Simpson
The Mariners have acquired left-hander Josh Simpson from the Marlins, both teams announced. Miami is receiving cash in the deal. Simpson was designated for assignment last week. Right-hander Logan Evans was placed on the 60-day IL in a corresponding move.
Evans underwent UCL surgery in late January and will miss the entire 2026 season, so his 60-day IL placement is no surprise. With Simpson taking Evans’ spot, Seattle’s 40-man roster remains full.
Simpson missed the majority of the 2024 campaign with an elbow injury. He put together three months of a 3.41 ERA at Triple-A this past year, earning his first big-league callup. Simpson was tagged for four earned runs across two innings in his MLB debut against the Braves, but settled in from there. He delivered eight straight scoreless appearances out of the Miami bullpen after the rough first outing. The lefty struggled over his next 12 appearances, ceding 17 earned runs. He capped off September with a seven-run debacle, once again while facing Atlanta.
The final result in Simpson’s first taste of the majors was a 7.34 ERA, though there were positive indicators. The reliever posted an xFIP and SIERA below 4.50. He punched out big-league bats at a near-24% clip. Simpson coaxed ground balls at a well above average 53.9% rate.
Photo courtesy of Bill Streicher, Imagn Images
Mariners Infield Notes: Donovan, Emerson, Bliss
Much of the focus in Mariners camp will be on the infield. Seattle’s biggest offseason moves — re-signing Josh Naylor and trading for Brendan Donovan — addressed two spots. They lost a couple infielders, Jorge Polanco and Eugenio Suárez, to free agency. It’s the biggest area of turnover on what might be the American League’s best roster.
Naylor and J.P. Crawford are locked into first base and shortstop, respectively. Donovan will be an everyday player. He’s a solid defender at second base and can handle the corner outfield as well, though his below-average speed means he fits better on the infield. Ryan Divish of The Seattle Times writes that Donovan’s early work with infield coach Perry Hill has come at third base.
That’s the simplest solution in the short term. Suárez and Ben Williamson, who was traded to Tampa Bay in the three-team Donovan deal, took the majority of the playing time last season. Of the five players who started games at third base in 2025, only Miles Mastrobuoni remains in the organization. Donovan didn’t get any work at the hot corner last year but logged 269 2/3 innings there between 2022-24. Although defensive grades aren’t especially meaningful in that small a sample, he has above-average marks from Defensive Runs Saved and Outs Above Average.
Donovan’s primary role will largely be determined by the progress of younger players around him. Cole Young had a brutal finish to his rookie season, but he remains the favorite to start at second base. Young is a former first-round pick who hit .279/.388/.432 in the minors and is entering his age-22 season. He remains a very promising young player even though he’s not technically a prospect anymore.
20-year-old shortstop Colt Emerson is even more highly regarded. The 2023 first-round pick combined for a .285/.383/.458 batting line with 16 homers and 14 steals over 600 plate appearances across three minor league levels. Emerson walked at a near-12% clip while striking out less than 18% of the time. He spent the majority of the season in High-A but ripped through Double-A to earn a late-season cameo at Triple-A Tacoma. He played six games there in the final week of the regular season.
Emerson is a consensus top 10 overall prospect at Baseball America, The Athletic, ESPN and MLB Pipeline. The likeliest outcome is that he opens the season at Tacoma with an eye towards a midseason promotion. It’d be a surprise if Emerson breaks camp, but the Mariners aren’t completely closing the door on that as Spring Training opens. “It’s not out of the question that he earns a spot on the team,” president of baseball operations Jerry Dipoto told reporters on Thursday (link via Daniel Kramer of MLB.com). Dipoto praised Emerson’s well-rounded skillset and maturity.
The probable Opening Day infield lines up as Naylor, Young, Crawford and Donovan from right to left. Emerson could get consistent reps against Triple-A pitching while building reps at third base, where he has 111 1/3 innings of professional experience. He’s the heir apparent at shortstop when Crawford hits free agency next winter but presumably wouldn’t push the veteran off the position this year. If Emerson has a monster Spring Training that forces the club’s hand, Donovan could kick back to second base and potentially move Young to Triple-A. That shouldn’t be an issue even if Donovan doesn’t play any second base during Spring Training given his ample work at the position.
Last year’s season-opening second baseman, Ryan Bliss, hasn’t gotten as much public attention. Bliss is older and not nearly as highly regarded as Young and Emerson, so that’s natural, but he’s a former second-round pick who hit .269/.377/.456 with 12 homers and 50 stolen bases in Triple-A in 2024. He unfortunately didn’t get much of an opportunity to solidify himself at the MLB level.
Bliss ruptured his left biceps on a swing two weeks into the regular season. He underwent surgery that came with a 4-5 month rehab timeline. Bliss returned to minor league game action in September and had an impressive week in Triple-A. He may well have reclaimed the second base job from Young to close the regular season had he not sustained a meniscus tear in his right knee that required season-ending surgery. Kramer writes that Bliss is back to full health this spring.
It’s a deep infield that’ll only become more crowded whenever Emerson earns the call. Bliss has a couple minor league options remaining. Leo Rivas also has an option but reached base at a .387 clip in 111 plate appearances last season and made the team’s playoff rosters. They flip-flopped Mastrobuoni and Luke Raley as the last hitter off the bench in October.
They’re both out of options, and it’s difficult to see Seattle carrying both players into the season if all their hitters get through camp healthy. They’ll need bench spots for backup catcher Andrew Knizner and righty platoon bat Rob Refsnyder. Keeping Mastrobuoni and Raley would require them to option both Bliss and Rivas before even considering an Emerson promotion. Dipoto acknowledged the likelihood that someone gets squeezed out at the end of Spring Training, conceding the front office may “have to make some uncomfortable short-term decisions.”
Mariners Sign Connor Joe, Jhonathan Díaz To Minor League Deals
The Mariners announced Tuesday that they’ve signed first baseman/outfielder Connor Joe and left-hander Jhonathan Díaz to minor league deals. Both players receive invitations to major league spring training. Díaz was outrighted by Seattle last week and briefly elected free agency but will return on a new minor league pact.
Joe, 33, briefly appeared with both the Padres and Reds last season but only totaled 42 plate appearances in the majors. He didn’t hit well in that time but from 2021-24 logged a respectable .244/.339/.395 batting line (99 wRC+) with 35 homers, 82 doubles, nine triples, an 11.2% walk rate and a 21.6% strikeout rate in 1566 plate appearances between Colorado and Pittsburgh. He spent most of last year in Triple-A, where he posted a disappointing .225/.346/.306 slash in 205 trips to the plate.
In 645 career plate appearances against lefties, the right-handed-hitting Joe is a .247/.344/.401 hitter, just a bit north of league-average by measure of wRC+. He’s logged 874 innings in right field, 944 innings in left field and 1089 innings at first base, with solid grades at first and in left field. Seattle already signed Rob Refsnyder to pair with lefty-swinging DH/corner outfielder Dominic Canzone, but Joe provides some depth in the event of an injury to Refsnyder.
The 29-year-old Díaz has pitched briefly in parts of five major league seasons but only has 46 1/3 MLB frames under his belt. He’s worked to a 4.66 ERA in that small sample, fanning 33 of 219 opponents (15.1%) against 27 walks (12.3%). He’s been a solid member of the Mariners’ Triple-A rotation in each of the past two seasons, starting at least 22 games in both seasons and keeping his ERA in the low 4.00s.
Díaz isn’t likely to crack Seattle’s Opening Day roster, but he’s a serviceable depth arm to have down in Tacoma and could be in line for additional opportunities in 2026 after right-hander Logan Evans underwent UCL surgery recently. Evans was likely Triple-A-bound himself but was sixth on Seattle’s rotation depth chart behind the quintet of Logan Gilbert, Bryan Woo, George Kirby, Luis Castillo and Bryce Miller. Right-hander Emerson Hancock is probably the first man up in the event of an injury now, but Díaz joins him, Casey Lawrence and fellow non-roster invitee Dane Dunning in that conversation.
MLBTR Podcast: Twins Front Office Shake-Up, The Brendan Donovan Trade, Eugenio Suarez, And More!
The latest episode of the MLB Trade Rumors Podcast is now live on Spotify, Apple Podcasts, and wherever you get your podcasts! Make sure you subscribe as well! You can also use the player at this link to listen, if you don’t use Spotify or Apple for podcasts.
This week, host Darragh McDonald is joined by Steve Adams of MLB Trade Rumors to discuss…
- The Twins parting ways with president of baseball operations Derek Falvey (2:10)
- The Mariners getting Brendan Donovan in a three-team trade with the Cardinals and Rays (18:15)
- The Reds signing Eugenio Suárez (35:50)
- The Pirates reportedly just missing on Suárez and what they could still do at this late stage of the offseason (39:20)
- The Giants having an agreement Luis Arráez and also Harrison Bader (49:20)
- The White Sox acquiring Jordan Hicks from the Red Sox (58:35)
- The Athletics signing Jacob Wilson to an extension (1:12:20)
- Several players not being allowed to participate in the World Baseball Classic due to insurance issues (1:16:05)
Check out our past episodes!
- Examining MLB’s Parity Situation – Also, Bellinger, Peralta, Robert, And Gore – listen here
- What The Tucker And Bichette Contracts Mean For Baseball – Also, Nolan Arenado And Ranger Suarez – listen here
- The Cubs Land Cabrera And Bregman, Remaining Free Agents, And Skubal’s Arbitration Filing – listen here
The podcast intro and outro song “So Long” is provided courtesy of the band Showoff. Check out their Facebook page here!
Photo courtesy of Joe Puetz, Imagn Images