Astros pitcher's season comes to an end, will undergo Tommy John surgery

Astros right-hander Hayden Wesneski is set to undergo Tommy John surgery, manager Joe Espada told reporters (including Chandler Rome of The Athletic) on Sunday. Matt Kawahara of the Houston Chronicle relays that the Astros expect him back at some point during the 2026 campaign. A more specific timetable for his return won’t be known until after the procedure, which is expected to be performed in Dallas by Dr. Keith Meister later this week. In any case, he’ll miss the remainder of the 2025 season and presumably at least the first half of 2026 as well.

The news brings an abrupt end to Wesneski’s first season in Houston. The 27-year-old was acquired from the Cubs alongside All-Star third baseman Isaac Paredes and top prospect Cam Smith in the deal that shipped longtime Astros star Kyle Tucker to Chicago back in December. Initially drafted by the Yankees in the sixth-round of the 2019 draft, Wesneski was traded to the Cubs in exchange for right-handed reliever Scott Effross at the 2022 trade deadline and went on to spend parts of three seasons as a swing man on the north side. Wesneski pitched 190 innings total across 22 starts and 46 relief outings for the Cubs from 2022 to 2024, and in that time he posted fairly pedestrian numbers with a 3.93 ERA (106 ERA+) and a 4.74 FIP. His 23.0% strikeout rate and 7.6% walk rate were both solid, but his production was generally held back by a penchant for allowing homers.

Among pitchers with at least 180 innings of work over that three-year span, Wesneski’s home run rate was ninth-highest.  That’s certainly not ideal, and that proclivity towards the long ball held Wesneski back from reaching what many evaluators viewed as a mid-rotation ceiling during his time with the Cubs. The Astros saw something they liked, however, as they not only traded for him as part of the Tucker deal but also gave him a spot in their Opening Day rotation. The righty was serviceable but unspectacular, with a 4.50 ERA and 4.79 FIP across six starts that both clocked in just a bit worse than league average. Home run issues persisted for Wesneski, but a reduced 4.6% walk rate was enough for some of his advanced metrics to improve, such as a 3.68 SIERA that clocked in well below his career mark.

Whether he’ll be able to push his actual production into a range closer to those peripheral numbers has become a question for another time, however. The right-hander was placed on the injured list with elbow discomfort nine days ago, and initial testing on his elbow did not provide much clarity about what issues Wesneski was facing until a follow-up appointment with Meister confirmed that the righty would need to go under the knife. While the Astros have said that Wesneski is expected back next year, Rome notes that the hurler is eligible for arbitration for the first time in his career this offseason and suggests that could make him a potential non-tender candidate this winter if he’s not expected to contribute much in 2026, as was the case with former Astro Jose Urquidy this past winter.

In the meantime, the Astros will left to rely on a rotation mix that just got a little less deep for 2025. Framber Valdez, Hunter Brown, Ronel Blanco, and Lance McCullers Jr. are currently joined by rookie Colton Gordon in the rotation, with Ryan Gusto in the bullpen as a swing option. Spencer Arrighetti, Luis Garcia, and Cristian Javier are all expected back at some point this season from the injured list to provide additional reinforcements, but the timeline for all three remains murky.