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Kyle Keller Re-Signs With NPB’s Yomiuri Giants

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Right-hander Kyle Keller has re-signed with the Yomiuri Giants of Nippon Professional Baseball, MLBTR has learned. Keller’s new contract is a one-year deal that includes a mutual option for the 2026 season, though specific financial terms remain unclear.

Keller, 31, was an 18th-round pick by Miami back in 2015 and made his big league debut with the club back in 2019. He ultimately spent three years in the majors with the Marlins, Angels, and Pirates. He struggled through 46 1/3 big league innings during that time with a 5.83 ERA and 7.00 FIP. While he struck out opponents at a decent 22.4% clip, he was held back by an untenable 14.7% walk rate that severely limited his effectiveness at the big league level. Those struggles in the big leagues led Keller to look overseas for his next opportunity, and he eventually signed with NPB’s Hanshin Tigers for the 2022 season.

The right-hander wound up acting as a prominent late-inning arm for the club over his two seasons with them. After dominating the Western League for the Tigers’ affiliate almost immediately, he found himself promoted to the Central League rather quickly and didn’t look back with a 3.31 ERA in 32 2/3 innings of work. Importantly, he showed far better command over his arsenal in NPB play with a fantastic 35.9% strikeout rate against a microscopic 3.9% walk rate during his first year in the Central League. His peripherals weren’t quite as stellar in his second season with the Tigers, as his 23.7% strikeout rate and 13.6% walk rate were more reminiscent of his time in the big leagues than anything else. That didn’t stop him from posting strong results, however, as he pitched to a 1.71 ERA in 26 1/3 innings of work.

Those strong results earned Keller interest both in NPB and from MLB clubs last winter, and he ultimately settled on a third season in NPB as he landed with the Yomiuri Giants on a one-year deal last winter. His 2024 season turned out to be the best of his NPB career so far as he dominated with a 1.53 ERA in 47 innings of work while flashing strong peripherals. Keller struck out an excellent 29.5% of opponents for the Giants last year, while his walk rate sat at a more manageable 10.4%. That combination of excellent results and solid peripherals backing the performance up was evidently enough convince the Giants to retain Keller for at least the 2025 season.

Given the recent MLB interest he’s received and his strong season last year, if Keller is able to turn in a similarly strong campaign at age-32 next year it wouldn’t be hard to imagine him exploring a return to stateside ball at some point in the future as other successful big league relievers like Robert Suarez have done in the past.

Rockies Sign Austin Nola To Minors Deal

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The Rockies have signed catcher Austin Nola to a minor league deal, according to MLB.com’s Mark Feinsand (X link).  Nola will receive an invitation to the Rockies’ big league spring camp.

After signing a split contract with the Royals last winter, Nola didn’t appear in a single game in the Show, though he was briefly called up to Kansas City’s roster for a few days in June.  Salvador Perez and Freddy Fermin were both so durable that the Royals never had a real need for another catcher on the roster, and Nola also didn’t do much to force the issue by hitting only .174/.260/.298 over 191 plate appearances with Triple-A Omaha.  The Royals outrighted Nola off their 40-man roster in September, and he became a free agent after the season.

Entering his age-35 season, the veteran backstop will look for a path back to the majors in Colorado, though a depth role at Triple-A is also a possibility given the number of catchers already on hand.  Jacob Stallings was re-signed to a new contract a few weeks ago, Hunter Goodman is a multi-position utility player who can catch, and top prospect Drew Romo made his MLB debut in 2024 and could be in line for more playing time on the active roster.

There is a bit of a full-circle element to Nola’s signing, as the Rockies picked him in the 48th round of the 2008 draft when Nola was still a high schooler, but he instead opted for college ball at LSU.  Nola made his MLB debut with the Mariners in 2019 and looked like a budding star, but his production gradually declined after a trade to the Padres in 2020.  He was still getting regular at-bats behind the plate in San Diego as recently as 2022, yet a sharp decline in 2023 resulted in the Padres non-tendering him a little over a year ago.

Mets Sign Oliver Ortega To Minors Contract

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The Mets have signed right-hander Oliver Ortega to a minor league deal that includes an invitation to New York’s big league spring camp, MLB Network’s Jon Morosi reports (X link).  Ortega was outrighted off the Astros’ 40-man roster in November, and since it wasn’t his first career outright, he chose to enter free agency.

The 28-year-old Ortega made his Major League debut in 2021, and he has a 4.03 ERA, 20.4% strikeout rate, and 10.8% walk rate over 58 career relief innings with the Angels and Twins.  After Houston claimed him off waivers from the Twins in October 2023, Ortega’s tenure as an Astro came and went without a single game played in either the majors or minors.  A pair of surgeries cost Ortega the entire 2024 season, as an initial procedure in Spring Training to remove loose bodies from his throwing elbow didn’t take, and he needed another surgery in late June to remove a bone spur from that same right elbow.

While a minor league deal doesn’t represent a huge commitment, the Mets seem satisfied enough with Ortega’s health situation to at least give him a look during Spring Training.  Ortega’s career Triple-A numbers include a 3.61 ERA, 27.7% strikeout rate and 7.42% walk rate over 72 1/3 innings, so he might be able to tap into that potential if he can improve his control against big league hitters.

Pirates Sign Tanner Rainey, Hunter Stratton To Minor League Contracts

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The Pirates have signed right-handers Tanner Rainey and Hunter Stratton to minors deals, as respectively reported by Just Baseball’s Aram Leighton (X link) and Stratton’s MLB.com profile page.  Rainey’s contract contains an invitation to the Pirates’ big league spring camp, and it can be assumed that Stratton’s deal also has an invite, though Stratton’s uncertain health situation in the wake of knee surgery could limit his participation in Spring Training.

Rainey heads to Pittsburgh after a topsy-turvy six-year run with the Nationals, highlighted by a World Series ring in his first year with the club.  Rainey delivered a 3.91 ERA and 34.6% strikeout rate in 48 1/3 relief innings for that 2019 championship team, but also had an ugly 17.8% walk rate.  These control issues plagued Rainey for most of his time in Washington, and he also missed virtually all of the 2023 season while recovering from Tommy John surgery.

After Rainey posted a 4.76 ERA, 19% strikeout rate, and 12.6% walk rate over 51 innings in 2024, the Nationals unsurprisingly decided to non-tender the righty, even though Rainey was projected for a modest $1.9MM arbitration salary.  Now entering his age-32 season, Rainey will look to rebuild himself in the Bucs’ spring camp, and hopefully regain some of the form and velocity that made him a valuable bullpen asset for the Nats in 2020 and 2022.

Stratton was also non-tendered by the Pirates in November, but there was an expectation that Pittsburgh would (just as they did last offseason) re-sign the righty to a new minor league deal.  Stratton has an impressive 3.26 ERA and 4.9% walk rate across 49 2/3 career Major League innings, all with Pittsburgh over the last two seasons.  Despite a lack of big strikeout totals, Stratton’s ability to induce soft contact has made him an interesting relief option out of the Pirates’ bullpen.

Unfortunately for Stratton, his 2024 season was cut short by a flukish injury on August 24 that left him with a ruptured patellar tendon.  Stratton was behind home plate at PNC Park and pursuing a loose ball when he stumbled into the stone wall, causing the injury and putting his career on hold for an estimated 7-10 months.  This fluid timeline means that Stratton would return anywhere from Opening Day to late June, but the minor league contract gives him plenty of time to fully get himself right during Spring Training or in the Pirates’ farm system.

White Sox Sign Nick Maton To Minor League Contract

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The White Sox signed Nick Maton to a minor league deal in late November, as indicated by the infielder’s MLB.com profile page.  Aram Leighton of Just Baseball Media (X link) writes that Maton’s contract an invitation to Chicago’s big league Spring Training camp.

Maton played in 179 games with the Phillies and Tigers over his first three Major League seasons, but he made just five appearances with the Orioles in 2024.  Baltimore acquired Maton from Detroit last February, and Maton then spent the season bouncing on and off the Orioles’ 40-man roster.  Maton was designated for assignment and then outrighted on three separate occasions, and he also spent about a month on the injured list at Triple-A Norfolk.

Between the roster shuffling and the injury absence, Maton was quite productive at the Triple-A level, hitting .258/.363/.471 with 16 homers in 344 plate appearances for Norfolk.  This marks the third straight season that Maton has posted strong numbers against Triple-A pitching, and he carried that momentum forward to the MLB level in 2022, posting an .855 OPS in 85 PA with the Phillies.

The Tigers were intrigued enough to bring Maton to Detroit as part of a five-player trade in January 2023, but Matt Vierling ended up being the much more productive utility option for the Tigers in both 2023 and 2024.  Maton struggled to a .173/.288/.305 slash line in 293 PA with Detroit, then had an arthroscopic knee surgery last offseason.

As he enters his age-28 season, Maton should have plenty of opportunity to break camp with a White Sox team that needs help all over the diamond.  Maton’s ability to play second base, third base, shortstop, and both corner outfield slots makes him an interesting candidate for bench or part-time duty, and his left-handed bat could complement Lenyn Sosa and Miguel Vargas (both righty swingers) at second and third base in particular.  The White Sox will give Maton a look in camp and see if he’s a fit, though keeping him as an organizational depth piece could be complicated by the fact that Maton is out of minor league options.

Rangers Sign Adrian Houser To Minors Contract

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The Rangers have signed right-hander Adrian Houser to a minor league deal, according to Just Baseball Media’s Aram Leighton (via X).  The contract contains an invitation to the Rangers’ big league spring camp.

It was just under a year ago that the Mets acquired Houser and Tyrone Taylor from the Brewers, as New York president of baseball operations David Stearns looked to bolster the Mets’ roster with two familiar faces from his old position in Milwaukee.  Taylor delivered respectable production as part of New York’s outfield mix, but Houser had a much rougher time in the Big Apple, posting a 5.84 ERA over 69 1/3 innings.

Injuries to other pitchers opened the door for Houser to begin the season in the Mets’ rotation, and he temporarily moved back to starting pitching when the Mets briefly adopted a six-man rotation.  The splits were pretty stark — Houser had an 8.55 ERA in 33 2/3 innings as a starter and a 3.28 ERA in 35 2/3 innings as a reliever, with those bullpen assignments usually coming in multi-inning form.

While it seemed like Houser had found his groove as a long reliever, the Mets opted to designate him for assignment and then release him in late July.  The Cubs and Orioles each signed Houser to minor league contracts during the season but those deals failed to translate into any more big league playing time for the righty.

Houser has started 104 of his 152 career Major League games, delivering solid-to-passable results as a swingman for the Brewers for much of his career.  A grounder specialist whose career strikeout rate is only 18.5%, Houser’s results in 2024 could somewhat close the door on his usage as a starter, even if the Rangers could see value in having a swingman around as rotation depth.  Beyond just last year’s splits, Houser has a 2.32 ERA in 97 career innings as a reliever, as compared to a much less impressive 4.57 ERA in 511 2/3 frames as a starter.

Relief pitching is also a much more significant need for a Rangers team could lose most of its 2024 bullpen (Kirby Yates, David Robertson, Jose Leclerc, Jose Urena, and Andrew Chafin) to free agency, plus Josh Sborz will be out until at least the start of June due to offseason shoulder surgery.  A multi-inning reliever like Houser could eat some up valuable innings out of the bullpen, while also providing a rotation safety net.  The current Texas pitching staff of Jacob deGrom, Jon Gray, Tyler Mahle, Kumar Rocker, and Jack Leiter is full of health question marks or inexperienced arms, so in addition to depth signings like Houser, the Rangers are also hoping to re-sign at least one of Nathan Eovaldi or Andrew Heaney.

Guardians To Re-Sign Shane Bieber

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Right-hander Shane Bieber is coming back to the Guardians. He and the club have reportedly agreed to a deal with a $10MM salary in 2025, with a $16MM player option for 2026 that comes with a $4MM buyout. That makes it a $26MM guarantee over two years but Bieber can potentially return to free agency after banking $14MM in year one. He reportedly turned down more money with other clubs in order to return to Cleveland. The righty is represented by Rosenhaus Sports Representation.

Bieber, 30 in May, returns to the only organization he’s ever known. The contract is a reflection of his current status, as he underwent Tommy John surgery in April, meaning he will miss at least part of the upcoming season. This deal affords him the chance to return to the mound in 2025 and establish his health. If his performance can return anywhere near his previously elite levels, he can decide to return to the open market. Though if he hits any kind of setback or doesn’t quite bounce back immediately, he can bank the extra $12MM and stick around another year.

Whether he can indeed get back in form is the big question. Bieber’s ceiling is well established, as he won the American League Cy Young award in 2020. He dominated the shortened season, making 12 starts that year with a 1.63 earned run average. He struck out 41.1% of batters faced, walked 7.1% of opponents and got grounders at a 48.4% rate.

But things have mostly gone downhill since then, even before the surgery. In 2021, his numbers dipped, which wasn’t exactly unexpected as maintaining his 2020 stats over a full season would have been almost impossible. His 3.17 ERA and 33.1% strikeout rate were both off of his previous season but still strong numbers. He missed about three months due to a right shoulder subscapularis strain.

In 2022, he stayed healthy enough to make 31 starts and log 200 innings with a 2.88 ERA, but with more concerning signs elsewhere. He averaged just 91.3 miles per hour on his fastball that year, after mostly being in the 93-94 range in prior years. His strikeout rate also dipped to 25%, still a bit above league average but a drop for him personally. In 2023, he missed time due to right elbow inflammation, which seems in hindsight like a precursor to his surgery. He did make 21 starts on the year but with a 3.80 ERA, 20.1% strikeout rate and similar velocity to the year prior.

Going into 2024, his name was in plenty of trade rumors. The Guardians often trade players as their salary grows and they get closer to free agency, doing so with players like Francisco Lindor, Carlos Carrasco and Corey Kluber somewhat recently. In hindsight, perhaps the Guards should have pulled the trigger on a deal, but maybe they didn’t receive substantial offers on the heels of all the red flags in 2022 and 2023.

For a brief moment, hanging onto Bieber seemed like a brilliant move. He made two starts at the beginning of 2024, tossing six shutout innings in each of them and recording 20 strikeouts in those 12 innings. His velocity came back slightly, with his fastball averaging 92.3 mph in his first start of the year. But it dipped to 91.6 mph in the second start and the news of his surgery dropped before he could make a third.

Now he’ll be looking to come back from the lengthy Tommy John recovery process, as well as the concerning seasons that preceded the operation. It’s now been a long time since Bieber had his best stuff over a full season, arguably since 2019. The shortened 2020 season was obviously outside of his control but all but one season since then has seen him miss significant time. In the one season where he stayed on the mound, his stuff was clearly diminished.

All that makes this an interesting gamble for the Guardians, as this is a fairly notable expenditure for them. They don’t generally spend much in free agency, particularly on the pitching side. As shown in MLBTR’s Contract Tracker, in the last 15 years, this is the first time they’ve given a pitcher more than $7MM. That’s partially a testament to their ability to develop their own pitching but they’ve also only given four position players a larger guarantee than this in that time.

Per RosterResource, the Guards are now projected for a payroll of $107MM next year, already more than what they spent in 2024. They could perhaps drop that by trading someone like Josh Naylor or Lane Thomas but this Bieber deal is a decent chunk of the budget either way.

It’s a risky proposition for those parameters. Given that recovery from Tommy John surgery normally takes 14 months or longer, the Guards might only get half a season or so from Bieber in 2025. If he hits a setback of any kind, it could be less than that. Even if he is back on a big league mound by June, it’s no guarantee that he’ll be in good form.

The upside play is that Bieber comes back to something resembling an ace. The Guards install him into their second half rotation and then, ideally, as a key piece of their postseason rotation. At that point, he would decline his player option and they could issue him a qualifying offer, which will probably be in the $22MM range. Assuming he declines that and goes out looking for a major deal, they would recoup draft pick compensation.

On the other end of the spectrum are the scenarios where Bieber isn’t quite fully healthy or simply isn’t as good as he was before, in which case he sticks around for another year at an even higher salary than in 2025.

It’s a risk the Guardians are willing to take, which is perhaps due to the respect that the organization has for him, but it’s also perhaps a reflection of the current rotation situation. The Guardians managed to win the Central in 2024, but the Bieber-less rotation was the weakest part of the roster. They struggled to find viable solutions there for much of the year, finding success on the backs of a decent offense and elite bullpen.

Pitchers like Carlos Carrasco, Triston McKenzie, Gavin Williams and Logan Allen either struggled or were injured or both. Tanner Bibee was the club’s only starter who has consistently healthy and performing well all year long. Matthew Boyd was an excellent midseason addition, coming in after recovering from his own Tommy John surgery, but he became a free agent at season’s end and has a deal in place with the Cubs.

Next year’s Opening Day rotation for Cleveland currently consists of Bibee and many question marks. Guys like Williams, McKenzie and Allen are still in the mix but coming off those aforementioned difficulties. Journeyman Ben Lively is on the roster, as are fairly unproven guys like Joey Cantillo and Doug Nikhazy. The Guards probably have more to do in upgrading that group but they will hope that Bieber can charge in like a proverbial white knight at some point in the middle of 2025 to save the day.

The aforementioned Boyd gives a rough template of what Bieber and the Guards will be hoping for next year. Boyd posted a 2.72 ERA in eight starts down the stretch and then had three more good outings in the postseason. That was enough to get him a two-year, $29MM deal, but Bieber has a path to earning far more than that. Boyd is going into his age-34 season whereas Bieber will be going into his age-31 campaign in 2026. Boyd’s injury track record is also more extensive than Bieber’s and Bieber has the more impressive early career numbers.

As such, with a strong finish in 2025, Bieber could position himself to earn far more than Boyd just did, joining 2025-26 free agent starters such as Dylan Cease,  Zach Eflin, Zac Gallen, Michael King, Seth Lugo, and Framber Valdez. Though that’s just one of many potential scenarios in front of him and the Guardians in the year to come.

Buster Olney of ESPN (X link) first reported that the two sides were in agreement. Robert Murray of FanSided (X link) first relayed that it was a one-year deal plus a player option. Jeff Passan of ESPN (X link) first had the dollar figures. Jon Heyman of The New York Post (X link) first relayed that Bieber had larger offers elsewhere.

White Sox, Cal Mitchell Agree To Minor League Deal

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The White Sox agreed to a minor league deal with free agent outfielder Calvin Mitchell, as first reported by Aram Leighton of Just Baseball. The Sports Management Partners client will be in major league camp as a non-roster invitee next spring.

Mitchell, 25, has spent parts of two seasons in the big leagues, logging 237 plate appearances with the Pirates from 2022-23. He hit .222/.284/.343 with five homers, 11 doubles, three stolen bases, an 8% walk rate and a 22.4% strikeout rate in that time. The former No. 50 overall draft pick (Pirates, 2017) spent the 2024 season with the Padres (his hometown organization) but didn’t get a call to the majors in spite of solid production with Triple-A El Paso: .277/.359/.512 (114 wRC+).

That was Mitchell’s fourth season with at least some time logged in Triple-A. He’s shown little difficulty hitting at that level, logging a career .287/.358/.487 batting line in 1067 plate appearances there. The lefty-swinging outfielder has typically had modest platoon splits but posted far more drastic numbers in that regard this past season, hitting .309/.397/.595 against righties but just .183/.239/.269 in 114 plate appearances against lefties.

Mitchell has played primarily right field but has more than 1000 innings in left field in addition to a tiny sample of 71 innings in center. He’ll give the Sox some left-handed depth behind a big league outfield mix currently including Andrew Benintendi, Luis Robert Jr., Dominic Fletcher, Austin Slater, Oscar Colas and Corey Julks.

Mets Sign Edward Olivares To Minor League Deal

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The Mets announced this evening that they’ve signed outfielder Edward Olivares to a minor league deal with an invite to MLB Spring Training. New York also confirmed their previously reported deals to bring outfielder Alex Ramírez and reliever Grant Hartwig back on non-roster pacts.

Olivares is the lone new acquisition of that trio. The righty-hitting outfielder has played for the Padres, Royals and Pirates over an MLB career spanning parts of five seasons. Almost half of his playing time came in 2023, when he appeared in 107 games for Kansas City. The Venezuelan outfielder hit .263/.317/.452 with 12 homers and 11 stolen bases over 385 plate appearances.

Despite the reasonable numbers, the Royals traded Olivares to Pittsburgh last winter. K.C.’s skepticism that he’d repeat his ’23 production was borne out. Olivares had a rough 55-game stint with the Bucs, hitting .224/.291/.333 with five homers. He was part of a very weak right field rotation until the Pirates designated him for assignment in early August. The Bucs hoped that deadline pickup Bryan De La Cruz would fix the position, but he also underperformed and was non-tendered last month.

Olivares has intermittently flashed intriguing physical tools. He has slightly above-average contact skills and owns a .254/.306/.407 batting line in nearly 1000 plate appearances. Olivares is a solid runner with plus arm strength. Despite solid athleticism, he grades as a below-average defender in the corners. He’ll vie for a rotational role in Carlos Mendoza’s outfield.

Orioles Outright Thaddeus Ward

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The Orioles announced that right-hander Thaddeus Ward has cleared outright waivers and been assigned to Triple-A Norfolk. There was no previous reporting that he had been removed from the 40-man roster, so this move drops their count to 37.

Ward, 28 in January, has never pitched for the Orioles. He was just claimed off waivers from the Nationals at the start of November but has now been bumped from his roster spot just over a month later.

Once upon a time, he was a notable prospect in the Red Sox’ system but he was left unprotected in the 2022 Rule 5 draft. The Nats grabbed him and kept him on the roster for the entire 2023 season. He didn’t pitch especially well, posting a 6.37 earned run average in his 26 relief appearances, but the Nationals likely didn’t care much. They were rebuilding that year and were presumably happy to obtain Ward’s full rights, even if it meant suffering through that subpar performance.

With his Rule 5 restrictions gone in 2024, the Nats were able to send him to the minors, but the numbers were again uninspiring. He made 28 Triple-A starts this year with a 5.64 ERA. His 19.3% strikeout rate and 17% walk rate were both a few ticks away from average. As mentioned, they put him on waivers, which is when Baltimore grabbed him.

The O’s are surely hoping to get Ward back to the form he showed prior to his Rule 5 selection. Way back in 2019, he threw 126 1/3 innings across 25 minor league starts, split between Single-A and High-A. He had a 2.14 ERA that year, striking out 29.9% of batters while giving out walks at a 10.9% clip. The minor leagues were canceled by the pandemic in 2020 and then Ward didn’t pitch much in 2021 while recovering from Tommy John surgery. He was back on the mound in 2022 and able to toss 51 1/3 innings with a 2.28 ERA, mostly in Double-A.

That was enough for the Nats to take a shot on him but, as mentioned, the past two years with that club didn’t go especially well. The O’s clearly have some belief in him, as they’ve grabbed him off waivers and now bumped him into a non-roster depth role. If he can get back on track and earn his way back onto the roster, he still has two option years and exactly one year of service time.

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