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.
Looking At The Mariners’ Internal Infield Options
At the end of the 2025 season, the Mariners lost three infielders to free agency, as each of Josh Naylor, Jorge Polanco and Eugenio Suárez hit the open market. That left shortstop J.P. Crawford as the only lock for the 2026 infield. The M’s quickly pounced to bring Naylor back, signing the first baseman to a five-year, $92.5MM deal not long after free agency began.
Reuniting with Polanco and/or Suárez still seems to be on the table but second and third base are open for now. What options do the Mariners have in the system at present? Let’s take a look at the possibilities.
Young is a former first-round pick, with the M’s taking him 21st overall in 2022. He came into 2025 as a consensus top 100 prospect. He was promoted to the big leagues at the end of May and primarily played second base. He eventually took 257 trips to the plate but produced a tepid .211/.302/.305 line, which translates to a wRC+ of 80.
That’s obviously less than ideal but there are some reasons for optimism. Young’s 10.9% walk rate and 18.3% strikeout rate were both strong. His .247 batting average on balls in play was more than 40 points below league average. His average exit velocity of 87.6 miles per hour was subpar but his max exit velo of 114.1 mph was in the top 10% of major league hitters. Perhaps he can tap into that premium velo a bit more as he gets more exposed to big league pitching. He hit .277/.392/.461 for a 120 wRC+ in Triple-A prior to his promotion, so perhaps his uninspiring major league debut was just a blip.
One year after taking Young, the M’s were selecting one pick later in the first round. They used the 22nd overall pick in 2023 to grab Emerson. He had a big rise in 2025, playing 90 games in High-A, followed by 34 in Double-A and six in Triple-A. Between those three levels, he took 600 trips to the plate and slashed .285/.383/.458 for a 129 wRC+. He also stole 14 bases while primarily playing shortstop, plus a few games at third.
Emerson is now a consensus top 15 prospect in the whole league. His Triple-A experience is still minimal and he’s only 20 years old but the Mariners would presumably have at least some willingness to carry him on the Opening Day roster. MLB teams are generally more willing to do that with top prospects these days because of the PPI benefits. The M’s carried 21-year-old Julio Rodríguez on their roster throughout 2022. When he won Rookie of the Year, that netted the M’s an extra pick in 2023. That allowed them to select outfielder Jonny Farmelo just seven picks after taking Emerson.
The M’s presumably won’t just hand a job to Emerson. He will have to earn it in spring. Theoretically, he could take over third base in 2026. Crawford is slated to be a free agent a year from now, at which point Emerson could potentially move over to short. It’s also possible that Felnin Celesten is more of a factor by then. Celesten is considered a better shortstop defender than Emerson but he hasn’t reached Double-A yet.
Bliss was a second-round pick of the Diamondbacks who came to the Mariners in the 2023 deadline deal which sent Paul Sewald to the desert. His 2025 season was marred by injury. First, a torn left biceps required surgery in April. He began a rehab assignment in August but then suffered a torn meniscus in his right knee. Due to that missed time, he has a .214/.287/.367 line in just 110 big league plate appearances over the past two seasons.
His minor league track record is naturally better than that. Bliss has 739 Triple-A plate appearances with a .260/.365/.453 line and 105 wRC+. He’s also huge threat on the bases with at least 50 steals in the minors in both 2023 and 2024. He has lots of minor league experience at both middle infield positions. He never had the same prospect hype as Young or Emerson but the speed and defense could make him a valuable player with even league average offense.
Williamson was a second-round pick in 2023. He generally put up good minor league numbers but with a pesky contact-based approach and very little power. He got into 85 big league games this year and hit .253/.294/.310 for a wRC+ of 76. There could be more in the bat but Williamson is lauded more for his glovework. Statcast only had him as average in the field this year but he was credited with eight Defensive Runs Saved.
Arroyo, 21, was an international signing out of Colombia and is now a consensus Top 100 prospect. In 2025, he got into 65 High-A games and 56 Double-A contests. Between those two levels, he slashed .262/.401/.433 for a wRC+ of 139. He has a bit of experience at third base and shortstop but was kept exclusively at second base in 2025. Since he hasn’t yet played at the Triple-A level, it’s probably a bit of a reach for him to crack the Opening Day roster, but he might have an outside chance. Even if Opening Day is out of the question, a midseason promotion would be a possibility.
Leo Rivas/Miles Mastrobuoni/Samad Taylor
These three are more in the part-time or utility bucket. Rivas can draw walks but has little power. He can play the three infield spots to the left of first base as well as the outfield corners. He could be on the bench but he also has an option remaining. Mastrobuoni’s minor league profile is somewhat similar but he hasn’t hit in the majors and is now out of options. Taylor has just 83 big league plate appearances and is also out of options. He has big wheels and can also play the outfield, so he could be a nice bench piece who comes in for pinch running and/or defensive substitute opportunities.
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Put it all together and it puts the Mariners in an interesting position. They are clearly in win-now mode. They just finished their fifth straight winning season. They won the West for the first time in over 20 years. They came achingly close to a World Series berth. The Astros and Rangers seem to be dealing with payroll issues. The A’s have some promise but still need to build a pitching staff. The Angels have lots of questions to be answered. The division is there for the Mariners to take.
That should arguably tilt them towards going for established big leaguers such as Polanco or Suárez or whoever else. On the other hand, there’s a chance Emerson is a future star who is ready to go. If he struggles in the spring, Williamson at least gives them a glove-first floor as a fallback. At second base, the M’s could leave it open for Young, Bliss and Arroyo to duke it out. Between the three, they would only need one of them to step forward and seize the job.
In an ideal world, a utility player who can also move to the outfield would make a lot of sense, so perhaps the M’s will make a spirited pursuit of Brendan Donovan. He could play second or third if the younger guys don’t take those jobs. If they do, he could move into the corner infield mix with Victor Robles, Dominic Canzone and Luke Raley. If that also got too crowded, the designated hitter spot is fairly open at the moment. Free agents like Willi Castro or Amed Rosario would be less-exciting versions of the Donovan pick-up.
RosterResource has the club slated for a $151MM payroll in 2026. That’s about $15MM below the $166MM they had at the end of 2025. President of baseball operations Jerry Dipoto recently said that next year’s payroll would probably be in a similar range to the prior season. Like all teams, they could use some pitching upgrades, so it will be fascinating to see how much of their remaining resources they use on the infield.
Photo courtesy of Joe Nicholson, Imagn Images