8:57am: Loaisiga first felt discomfort in his elbow near the end of his most recent outing on Wednesday, manager Aaron Boone explained to the Yankees beat this morning (X link via Greg Joyce of the New York Post). He called the injury “concerning,” noting that an MRI conducted last night revealed a “significant” strain. Loaisiga and the team are gathering more information on the injury and will determine next steps for the right-hander once they’ve received additional opinions.
7:35am: The Yankees have placed right-handed reliever Jonathan Loaisiga on the 60-day injured list with a right flexor strain, the team announced. In a corresponding move, the team has selected the contract of right-hander Dennis Santana. He’s joining the big league bullpen.
Loaisiga, 29, has all the makings of a high-end leverage reliever but hasn’t been able to stay healthy enough to establish himself in that role. He showed just how dominant he could be back in 2021 when he pitched 70 2/3 innings of 2.17 ERA ball with an above-average 24.4% strikeout rate, a very strong 5.4% walk rate and a sensational 60.6% ground-ball rate. The Nicaraguan-born righty averaged a blazing 98.4 mph on his sinker that season, notched an excellent 13.7% swinging-strike rate and posted a mammoth 41.1% opponents’ chase rate on pitches off the plate.
Unfortunately for both the Yankees and for Loaisiga, that’s the only season in which he’s ever thrown even 50 big league innings. Loaisiga has only reached even 20 appearances in two seasons. Since committing to a bullpen role in 2020, he’s delivered 163 1/3 innings with a 2.98 ERA (3.34 FIP, 3.42 SIERA), 20.3% strikeout rate, 6.5% walk rate and 58% grounder rate. There’s little doubting the raw talent is there to make him a star bullpen arm, but he’s missed time due to a shoulder strain, subsequent shoulder inflammation, elbow inflammation (twice) and now a flexor strain that’ll sideline him into at least the early summer months.
If Loaisiga’s absence extends further than that 60-day minimum, it’s feasible this could spell the end of his time in the Bronx entirely. The right-hander has five-plus years of major league service time and is slated to become a free agent at season’s end.
Santana, 27, signed a minor league pact with the Yankees back in early December. Like Loaisiga, he features a power sinker and strong ground-ball rates when at his best, but he hasn’t found nearly the same success and consistency that Loaisiga has when healthy.
Once one of the Dodgers’ top-ranked pitching prospects, Santana has bounced to the Rangers, Mets and now Yankees since leaving Los Angeles. He’s pitched just 149 2/3 innings in the big leagues and has a pedestrian 5.17 ERA to show for it (though a 4.26 FIP and 4.47 SIERA are a bit more favorable). Santana has averaged just under 96 mph on his sinker in his career and has kept the ball on the ground at a nearly 50% clip since adopting that as his primary offering. But he’s walked more than 12% of his big league opponents and struggled with men on base, resulting in a well below-average strand rate that’s helped to inflate his ERA.
Santana has regularly missed bats at a high level in the upper minors, and his power sinker fits a mold that the Yankees tend to prefer out of their late-inning relievers. He’ll need to improve his command, but Santana wouldn’t be the first relatively obscure arm to break out with the Yankees if he can get himself on track in the Bronx. He’s out of minor league options, however, so it could be a short stint on the 40-man roster if the Yankees feel they need to open another spot in the near future. If he gets a decent leash and can find some success, he’s controllable through the 2026 season via arbitration.
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