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Thomas Hatch Signs With KBO’s Doosan Bears

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The Korea Baseball Organization’s Doosan Bears have signed right-hander Thomas Hatch, per a team announcement (h/t to Dan Kurtz of MyKBO). The 30-year-old will earn $1MM in 2025, paid out as a $200K signing bonus and an $800K salary.

A third-round pick by the Cubs in the 2016 draft, Hatch was shipped to Toronto in the 2019 trade that brought right-hander David Phelps to Chicago. Hatch subsequently made his big league debut with the Blue Jays just a year later during the shortened 2020 season and impressed in his first taste of big league action with a 2.73 ERA in 26 1/3 innings of work. Solid as that top-level run prevention figure was, however, there were some potential red flags under the hood including an 11.9% walk rate and a rather pedestrian 4.14 FIP.

Given those concerning peripherals, it wasn’t necessarily a shock when the wheels came off for Hatch a bit during the 2021 season. The right-hander pitched just 14 innings in the majors with a 10.93 ERA over the next two years as he walked eight batters and struck out 12. In spite of those struggles, he continued to post decent numbers with Triple-A Buffalo and earned a more extensive opportunity in the majors during the 2023 season. It went reasonably well for the right-hander, as he posted a solid 4.08 ERA across 28 2/3 innings of work with the Blue Jays and Pirates. Looking under the hood, Hatch’s performance came with a strong 52.3% groundball rate and a respectable 20.2% strikeout rate while his walk rate dipped to a still elevated but more manageable 9.3%.

Those promising peripherals and improved results got the attention of the Hiroshima Carp of Japan’s Nippon Professional Baseball, who signed him to a one-year deal last offseason. That first foray into overseas baseball didn’t go especially well for Hatch, as he was relegated to the Carp’s Western League affiliate for most of the season after struggling with the Central League club. While he dominated in 72 1/3 Western League innings to the tune of a 2.36 ERA, Hatch was torched in the Central League with a 7.36 ERA in 22 innings across five appearances. Those struggles were evidently enough for Hiroshima to part ways with Hatch this winter, leading him to head to South Korea to sign with the Bears. In the KBO, Hatch will lock down a larger salary than he would’ve been able to find in stateside ball and hope to re-establish himself as a pitcher, potentially opening the door to a more lucrative return to either NPB or MLB play in the future.

Drew Anderson Re-Signs With KBO’s SSG Landers

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Right-hander Drew Anderson has re-signed with the SSG Landers of the Korea Baseball Organization, per a club announcement (h/t to Dan Kurtz of MyKBO). Anderson will earn $1.2MM in 2025, with $50K available in incentives.

Anderson, 30, last played in the majors back in 2021. A 21st-round pick by Philadelphia in the 2012 draft, the righty made his big league debut in 2017 and spent the next half-decade bouncing between the major and minor leagues with the Phillies, White Sox, and Rangers organizations. In that time, he struggled to a 6.50 ERA in 44 1/3 innings of work at the big league level despite decent peripherals, including a 4.35 FIP. During the 2021-22 offseason, Anderson was released by the Rangers and opted against searching for a new stateside deal. Instead, he headed to Japan to pitch for Nippon Professional Baseball’s Hiroshima Carp on a $1MM deal.

The right-hander ultimately spent two seasons in NPB, and pitched quite well during that time. Anderson posted a 3.05 ERA in 115 innings across 34 appearances for the Carp in total, striking out 20.7% of opponents while walking just 8.4%. That was enough to earn him some stateside attention during the 2023-24 offseason, and Anderson landed with the Tigers on a minor league deal back in January. The right-hander failed to make Detroit’s Opening Day roster, however, and after just nine appearances with Triple-A Toledo the Tigers agreed to release him so he could head to South Korea and play for the Landers.

Anderson slotted into the Landers’ rotation alongside former big leaguers Kwang Hyun Kim and Roenis Elias and pitched fairly solidly in his first year of KBO play. While the right-hander’s 3.89 ERA was hardly exceptional, his 115 2/3 innings of work was his most in a season since 2018 and and he struck out an excellent 31.9% of opponents faced. That massive uptick in strikeout rate came with an elevated 10.7% walk rate, but that firepower makes it easy to imagine Anderson finding greater success with the Landers in 2025 and potentially getting the attention of MLB clubs once again next winter.

Should Anderson wish to make it back to the big leagues, there’s certainly reason for optimism that he’ll be able to do that. The KBO has served as a proving ground for other hurlers who struggled in their first taste of big league action in the past. Merrill Kelly is one standout example of a player who pitched in the KBO before returning to stateside ball to make a name for himself, and right-hander Erick Fedde landed a $15MM guarantee from the White Sox just last offseason after a dominant 2023 campaign in South Korea.

Mitch White Signs With KBO League’s SSG Landers

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The SSG Landers announced that right-hander Mitch White has agreed to a one-year, $1MM contract with the Korea Baseball Organization team.  White elected to become a minor league free agent at season’s end, after he was previously outrighted off the Brewers’ 40-man roster back in June.

A second-round pick for the Dodgers in the 2016 draft, White drew some top-100 attention during his time in the Los Angeles farm system, and he cracked the big leagues during the shortened 2020 campaign.  White posted a 3.58 ERA, 22.02% strikeout rate, and 8.31% walk rate over 105 2/3 innings with the Dodgers from 2020-22, working as either starter or reliever based on the team’s needs.

L.A. often shuttled White back and forth between Triple-A and the majors as part of this swingman role, and ultimately found him expendable enough to be dealt to the Blue Jays at the 2022 trade deadline.  The deal seemingly derailed White’s career, as the right-hander has badly struggled against MLB hitters since leaving the Dodgers organization.  He posted a 7.74 ERA in 43 innings for the Jays for the rest of the 2022 season, and a 7.18 ERA in 36 1/3 innings since Opening Day 2023.

White’s 2024 workload of 23 2/3 innings was split between Toronto, San Francisco, and Milwaukee.  The Giants picked White up from the Jays after Toronto designated him for assignment in April, and the Brewers acquired him a few weeks later after the Giants also sent him to DFA limbo.  White’s only time in the minor leagues was spent with the Brewers’ Triple-A affiliate, and his numbers (4.06 ERA, 27.2% strikeout rate, and 8.8% walk rate) were at least a marked improvement over his time in the Show.

Since White’s chances of landing a guaranteed contract from a Major League team this winter weren’t great, the move to South Korea allows White (who turns 30 in December) the opportunity to lock in a seven-figure salary.  A strong showing with the Landers could put White back onto the radar for MLB teams next offseason, if he has interest in making a fairly quick return to North American baseball.  Playing in the KBO League also some additional personal appeal to White, whose mother is Korean.

KBO’s Doosan Bears Sign Cole Irvin

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The Korea Baseball Organization’s Doosan Bears announced that they’ve signed left-hander Cole Irvin to a one-year deal that’ll guarantee him $1MM, coming in the form of an $800K salary and $200K signing bonus (link via Jee-ho Yoo of South Korea’s Yonhap News Agency).

It’ll be the first stint overseas for Irvin, who’s pitched in the majors with the Phillies, A’s, Orioles and Twins over the past six seasons. The now 30-year-old southpaw (31 in January) was a quality innings eater for the 2021-22 A’s, starting 62 games and pitching to a 4.11 ERA. Irvin’s 90.7 mph average fastball and 16.8% strikeout rate were both well below average, but he also demonstrated pinpoint command, limiting opponents to a 5.2% walk rate.

The Orioles acquired Irvin from the A’s in exchange for Darell Hernaiz heading into the 2023 season, hoping to solidify the back of their rotation. It didn’t pan out. Irvin was hit hard early and surprisingly optioned to Triple-A just weeks into the season. He returned later in the year and rebounded to finish with a 4.42 ERA in 77 1/3 frames, spending more time in the bullpen than in the rotation.

The 2024 season didn’t work out much better; Irvin was tagged for a 4.86 ERA in 16 starts and nine relief appearances before being designated for assignment and heading to the Twins via waivers. He allowed five runs in 3 2/3 frames with Minnesota, finishing out the season with a 5.11 ERA. The Twins outrighted him at the end of September, and he elected free agency in early October.

In all, Irvin heads to the KBO with a career 4.54 ERA, 17.1% strikeout rate and 5.6% walk rate in 593 big league innings. The Bears’ press release announcing his signing specifically touted the southpaw’s “great control,” which has indeed been Irvin’s greatest strength in the big leagues thus far.

Whenever a pitcher heads overseas on a one-year deal, it’s possible that some tweaks (new pitch, altered mechanics or pitch usage rates) yield big results and pique the interest of MLB clubs the following winter. But, it’s just as possible that Irvin will pitch his way into more lucrative opportunities in Asia. The $1MM salary he’s receiving this year is the maximum for first-year foreign signees in the KBO, but he could earn a raise next season or perhaps garner interest from a team in Japan, where players typically have greater earning power than in Korea.

KBO’s Kia Tigers To Sign Adam Oller

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Right-hander Adam Oller has agreed to terms with the Kia Tigers of the Korea Baseball Organization, reports Ari Alexander of Houston’s KPRC-2. It’ll be the Gaeta Sports Management client’s first stint overseas, and he’ll join the reigning KBO champs.

Oller, 30, has pitched in each of the past three big league seasons. Originally a 2016 draftee of the Pirates, he wound up out of affiliated ball by 2019 but parlayed stints in the independent Frontier League (2019) and in the Australian Baseball League (2020-21) into a minor league opportunity with the Mets. He made the most of that, pitching his way into prospect status with an outstanding age-26 season split between Double-A and Triple-A. The A’s were intrigued enough to acquire Oller and fellow righty J.T. Ginn as their return from the Mets in the trade sending Chris Bassitt to Queens.

Things didn’t work out for Oller in Oakland, however. He was in the majors early during his first season with the organization but hit hard in both 2022 and 2023, yielding a combined 7.09 ERA in 94 frames. The A’s tried to pass him through waivers in July of ’23, but the Mariners claimed him and optioned him to Triple-A Tacoma. He’d spend the remainder of the season with Seattle’s top affiliate, eventually clearing waivers and electing free agency after being dropped from the roster in October.

Oller caught on with the Guardians and Marlins on minor league deals in the year that followed, the latter of whom selected him to the majors this past July. He pitched another 42 1/3 MLB frames across eight starts but was tagged for a 5.31 ERA. Oller did have a handful of nice outings in Miami, but it was an up-and-down tenure with more lows than highs. He was passed through waivers again at the beginning of this month, elected free agency and will quickly find a new opportunity overseas.

Despite his lack of MLB success, there’s reason to think Oller could fare well in the KBO. He posted sharp numbers in Triple-A in 2021-22, struggled through a disastrous season with the Athletics’ Triple-A Vegas club in 2023, and then again pitched to a 2.88 ERA with the Marlins’ top affiliate this past season. His 6.22 Triple-A ERA in 2023 skews his career-long mark to 5.01, but he’s typically been a solid arm at the top minor league level. Oller averages 93.7 mph on his four-seamer, complementing the pitch with a curveball and lesser-used changeup.

It’s at least feasible that Oller could spin one strong KBO season into a big league return, though success overseas can also open further opportunities in Asia. It’s common for players who thrive in the KBO to re-sign for a pay raise in their second season or perhaps to draw interest from teams in Japan’s Nippon Professional Baseball. However it plays out, the earning power for Oller overseas is surely greater than it would be on a minor league deal in North America, and for a pitcher who’s already turned 30 and is still not into arbitration, that’s a compelling selling point.

Mariners Prioritizing Infield Bats

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The Mariners are once again looking to upgrade their offense this winter after 2024’s underwhelming results at the plate squandered a terrific season from their pitching staff. Unsurprisingly, general manager Justin Hollander tells Jon Morosi of MLB.com that the M’s view second base as a priority this offseason. Ken Rosenthal of The Athletic adds that the M’s would also like to add at first base. Ideally, Seattle would add one bat to help out at second or third base — with Josh Rojas and Dylan Moore a potential platoon at the other spot — and another at first base. Hollander downplayed the idea of adding to the outfield, telling FanSided’s Robert Murray that between Randy Arozarena in left, Julio Rodriguez in center, Victor Robles in right and Luke Raley as a corner outfield/first base/DH option, the Mariners feel they have potential for a “pretty high-end outfield.”

With the offseason just days old, there are of course virtually limitless options to explore via free agency and trade. Morosi reports that Seattle is among the teams to have evaluated Hyeseong Kim, the star second baseman of the Korea Baseball Organization’s Kiwoom Heroes. Kim, 25, is scheduled to be posted for MLB clubs to bid on this winter. Rosenthal lists a reunion with Justin Turner as something Seattle could pursue. He cautions against the likelihood of the Mariners spending to the levels necessary to add longtime division rival Alex Bregman or (to a lesser extent) first baseman Christian Walker.

Kim, 26 in January, hit .326/.383/.458 with 11 home runs, 30 steals, an 8.3% walk rate and just a 10.9% strikeout rate for the Heroes this past season. He’s been a plus hitter three straight seasons in the KBO but is more of a contact-, speed- and defense-oriented player, as he’s not considered to have much home run pop. This past season’s 11 round-trippers were a career-high. Turner, of course, finished out the 2024 season in Seattle after coming over from the Blue Jays in a trade. He batted .264/.363/.403 in 190 plate appearances as a Mariner. His overall .259/.354/.383 slash is a ways from peak levels, and Turner will turn 40 later this month. That said, he was still a productive big league hitter this past season.

The Mariners’ expected focus on infield bats — and their flexibility to look at multiple positions — was laid out in our Mariners Offseason Outlook. As noted in that piece a few weeks back, Kim and Gleyber Torres are two particularly interesting options at second base, and both are likely to be relatively affordable. Former Padres shortstop Ha-Seong Kim could technically be a fit at second or third base, but he’s likely to miss the beginning of the season following his recent shoulder surgery and derives a good bit of his value from his plus glovework. He’d be a less-than-ideal fit if the goal is to bolster the offense from day one.

Meanwhile, signing Bregman or Willy Adames (perhaps with eye toward moving him to third base) would represent a major philosophical departure from the Mariners’ past mode of operation. The M’s have only given out one multi-year deal to a free agent position player under president of baseball operations Jerry Dipoto — that being last winter’s two-year, $24MM pact to Mitch Garver. Rosenthal suggests that signing a $100MM+ deal could be outside the team’s budget, but even beyond that, it’s simply not how Dipoto has historically operated.

The trade market could present various alternatives. The Rays will likely listen to offers on Yandy Diaz, making him one speculative fit at first base. He’d align well with Seattle’s desire to reduce their MLB-worst strikeout rate and is slated to earn $10MM next year with a $12MM club option for 2026. Rays second baseman Brandon Lowe, owed $10.5MM with an $11.5MM club option for 2026, is another on-paper fit. He wouldn’t reduce the team’s strikeout rate, but he’s a potential impact bat with multiple years of club control. Cleveland could listen to offers on slugging first baseman Josh Naylor.

However things play out, the M’s will be looking to once again redraw an offense that has struggled to make contact at one of the most glaring rates in the league. In addition to tying the Rockies with an MLB-high 26.8% strikeout rate, Mariners hitters had the league’s third-lowest overall contact rate (74%) and were tied for MLB’s second-worst contact rate on swings at pitches within the strike zone (82.9%). The Seattle lineup actually chased pitches off the plate at the fourth-lowest rate in MLB … but their contact rate on those swings was still the third-worst.

MLB Tenders Status Check On KBO Infielder Hyeseong Kim

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The Korea Baseball Organization announced last night that MLB has tendered status checks on two players: second baseman Hyeseong Kim and first baseman/catcher Baek-Ho Kang (h/t to Dan Kurtz of MyKBO.net). That indicates both players are on the radar of at least one MLB team, though only Kim seems likely to make the jump this offseason.

A status check is the process used when an MLB team shows interest in a Korean player. MLB does not reveal the identity of the team or teams that requested the check. It is not an official opening of the posting process, which begins a 30-day window for a KBO player to negotiate with big league clubs.

The status check doesn’t mean that a player is going to come to MLB, though it’s a necessary first step for any player who eventually does so. Last offseason, status checks presaged postings and MLB deals for Jung Hoo Lee and Woo-Suk Go. MLB also conducted a status check on free agent reliever Deok Ju Ham, but he elected to re-sign with his KBO team a few weeks later.

Regarding Kim, the status check is a formality. The lefty-hitting infielder (not to be confused with MLB free agent Ha-Seong Kim) has prepared for a move to MLB since last winter. Kim has played parts of eight KBO seasons with the Nexen/Kiwoom Heroes. The Heroes announced in January that they would make him available to major league clubs during the 2024-25 offseason via the posting system. Kim hired CAA as his representation in June.

The 25-year-old hit .326/.383/.458 across 567 plate appearances this year. He’s a career .304/.364/.403 hitter. KBO pitching is much weaker than it is at the major league level. Scouting reports generally suggest Kim profiles as a utility player. MLB teams enamored with his glove could view him as a low-end regular at second base. He doesn’t have a ton of power upside, as this year’s 11 home runs represent a career high. Kim will very likely be posted later in the offseason. Last year, the Heroes waited until early December to post Lee. The LG Twins did the same with Go.

Kang, who plays for the KT Wiz, is reportedly not interested in pursuing an MLB opportunity at this time. Kurtz points to a Korean-language report from Sports Kyunghang in which team officials say that they confirmed with Kang that he intends to remain with the Wiz despite the status check. (The status check is only an indication that an MLB team is interested in the player, not the other way around.) Kang hit 26 home runs with a .289/.360/.480 batting line this season. FanGraphs wrote last offseason that Kang had plus power but projected as a first baseman with questions about his pure hitting ability as an MLB prospect.

Daniel Castano Announces Retirement

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Left-handed pitcher Daniel Castano announced his retirement via a post on his personal Instagram account. “After 25 Baseball seasons, 9 years pro, 3 in college, 4 in HS, and 10 years of little league, I’m finally hanging up the cleats and for my more important career in life,” the post reads. “To be a loving Husband, father, friend, churchman and employee.” He goes on to thank the many people who helped him on his journey and mentions he will be pivoting to a role with Entrusted Contracting.

As Castano himself mentioned, his baseball journey had many stops. He pitched at Lake Travis High School in Austin, Texas, which then led him to Baylor University. He pitched three seasons for the Bears before the Cardinals selected him in the 19th round of the 2016 draft.

Just over a year later, Castano was flipped to the Marlins. Zac Gallen, Sandy Alcántara, Magneuris Sierra and Castano were sent to Miami in the December 2017 trade that sent Marcell Ozuna to St. Louis. Castano made it to the big leagues with the Fish in 2020, the first of four straight major league campaigns in which he appeared. He logged 88 2/3 frames over those four seasons, allowing 4.47 earned runs per nine. His 12.4% strikeout rate wasn’t especially strong but he limited walks to a 7.9% clip and kept 45.2% of balls in play on the ground.

The Marlins shuffled Castano on and off their roster in 2023 but he wasn’t holding a 40-man spot at the end of the season and became a free agent. In December, he landed a deal with the NC Dinos of the Korea Baseball Organization. He made 19 starts for the Dinos this year, posting a 4.35 ERA in 111 2/3 innings. At the end of July, the Dinos signed Eric Jokisch and bumped off Castano, as a KBO team can only have two non-Korean pitchers on its roster.

Now it seems Castano has decided it’s time to move on from baseball and move towards, as he puts it, his “more important career in life.” We at MLBTR salute him on carving out a big league career and we wish him the best for the upcoming chapters of his life.

Darin Ruf Joins University Of Nebraska Omaha Coaching Staff

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Former big league first baseman/outfielder Darin Ruf has joined the University of Nebraska Omaha baseball program as an assistant coach, the school announced Wednesday. There’s been no formal announcement of retirement for the 38-year-old Ruf, but this certainly seems to indicate he’s turning the page on his playing days and moving onto the next phase of his baseball journey.

“We are thrilled to have Darin join our baseball family,” Mavericks head coach Evan Porter said in a statement within today’s announcement. “Darin’s incredible track record speaks for itself, but his character and work ethic are perhaps more impressive. I’ve been fortunate to know Darin for the past 20 years, his respect for the game and for the people around him is admirable. I couldn’t be more excited to work with Darin, he is a tremendous addition to our program.”

A 20th-round pick out of Omaha’s Creighton University back in 2009, Ruf reached the majors with the Phillies in 2012 and went on to enjoy a nine-year career in the major leagues in addition to an excellent three-year run with the Samsung Lions of the Korea Baseball Organization (2017-19).

Ruf’s debut campaign with the Phils was brief but showed clear potential for a meaningful big league career. He appeared in 12 games as a September call-up and popped three homers while batting .333/.351/.727 in 37 trips to the plate. The following season saw Ruf tally 293 plate appearances while hitting .247/.348/.458 with 14 round-trippers. He’d ultimately spend parts of five seasons with the Phillies, from 2012-16, batting a combined .240/.314/.433 while serving as a part-time first baseman and corner outfielder who could provide some right-handed thump off the bench.

From there, Ruf’s next stop was overseas. He not only found success with the KBO’s Lions — he took the entire league by storm. Ruf smacked 38 homers in his first Korean season and wound up posting a massive .313/.404/.564 batting line in 1756 plate appearances as a Lion. He belted 86 homers, 105 doubles and six triples during his run in the KBO, with overall offense about 45% better than league-average, by measure of wRC+.

Ruf returned stateside for the 2020 season, taking a minor league deal with the Giants that proved to be an outstanding deal for San Francisco. He cracked the Giants’ opening day roster in the shortened 2020 campaign, his age-33 season, and in 100 plate appearances turned in a .276/.370./517 slash that made him an easy call to keep for the Giants to tender him a contract in arbitration in the 2020-21 offseason. Ruf’s 2021 output was even better than that small-sample 2020 showing; in 312 plate appearances he hit .271/.385/.519 with 16 homers.

That sudden resurgence in the majors prompted the Giants to ink Ruf to a two-year, $6.25MM contract. His bat took a step back in the first season of the deal, but Ruf was still hitting at a slightly better-than-average level when the Mets acquired him at that summer’s trade deadline. His bat cratered following the move to Queens, however, and New York designated Ruf for assignment just before Opening Day 2023. He was released in early April, signed a minor league deal to return to the Giants, and split the 2023 season between San Francisco and Milwaukee, seeing brief playing time at both stops.

It now seems likely that’ll be the final stage of Ruf’s playing career. If he’s indeed shifting his focus to a coaching track, he’ll conclude his time in the majors with a career .239/.329/.427 batting line, 351 hits, 67 homers, 69 doubles, three triples, six steals, 198 runs scored and 205 runs driven in. Between MLB and the KBO, he cracked more than 150 homers and piled up more than 800 hits — all while earning more than $9MM in the majors and more than $4MM in South Korea.

The Omaha native will now help mold a younger generation of players while returning to his hometown. Ruf expressed excitement and gratitude in a statement of his own within today’s announcement:

“I am thrilled to be joining Evan’s staff in Omaha. I have been blessed with amazing coaches throughout my career and I am honored Evan has given me the opportunity to give back and work with these student athletes. I look forward to working with them on the field to become the best ball players they can be and off the field as they continue to develop into great people for the community of Omaha.”

KBO’s Kia Tigers Sign Eric Stout

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The Kia Tigers of the Korea Baseball Organization announced this week that they’ve signed former MLB left-hander Eric Stout. He’s a temporary injury replacement for righty James Naile, who sustained a broken jaw when he was hit in the face by a comebacker off the bat of Matt Davidson (link via Jeeho Yoo of Yonhap News).

Stout, a 31-year-old southpaw, has 23 major league appearances under his belt. Three of them came with the Royals in 2018. The remainder were in ’22, when he combined for 20 outings between the Pirates and Cubs. Stout turned in a 5.64 ERA across 22 1/3 innings, striking out 22.7% of batters faced against an elevated 14.5% walk rate. He spent most of last year in Triple-A and signed in Taiwan’s Chinese Professional Baseball League for the ’24 season. Stout had a 2.77 ERA across 113 2/3 innings spanning 20 appearances to earn the bump to the KBO.

Naile, 31, appeared in 17 games for the Cardinals between 2022-23. While he struggled to a 7.40 earned run average, he parlayed a strong Triple-A season into a deal with the Kia Tigers. The UAB product had a 2.53 ERA with a decent 21.5% strikeout rate over 149 1/3 frames in his debut year in Korea. The jaw injury unfortunately ends his regular season, though Yoo suggests he could return in the playoffs.

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