The Astros signed Jose Abreu to a three-year, $58.5MM contract during the 2022-23 offseason, seemingly sealing up a first base position that was one of the few weak links on the club’s World Series-winning roster from the prior season. Abreu was entering his age-36 season and his power numbers had dropped off considerably in 2022, but the former AL MVP still delivered a strong overall year at the plate by hitting .304/.378/.446 in what proved to be his final year with the White Sox. Coming off an impressive 137 wRC+, Abreu’s “professional hitter” track record indicated that he would continue to be productive into his late-30’s, making his deal a wise investment for Houston on paper.
In practice, of course, things quickly went south for Abreu in his new home. After hitting only .237/.296/.383 in 594 PA in 2023, Abreu hit so poorly (.124/.167/.195) over his first 120 PA of the 2024 season that the Astros chose to release the veteran in June of last year, and simply ate the remainder of his contract. Right now, roughly $11.9MM is still owed to Abreu through the remainder of the 2025 season.
Even with such a big chunk of Abreu’s deal still on the books for 2025, the Astros certainly felt the need to address first base in a major fashion this past winter. It should be noted, technically, that Christian Walker was Houston’s backup plan for the first base position. After acquiring Issac Paredes as part of the Kyle Tucker trade, the Astros then seemingly had another deal lined up with the Cardinals to land Nolan Arenado, which would’ve installed Arenado at third base and Paredes as Houston’s new first baseman. Instead, Arenado used his no-trade protection to reject the move to Houston, with later reporting revealing that Arenado wasn’t closing the door on the Astros entirely as a landing spot, but simply wanted a bit more time to evaluate the situation given that Houston had just dealt away a superstar in Tucker.
Rather than wait for Arenado, the Astros instead made a splash on the free agent market by signing Walker to a three-year, $60MM contract. This made Paredes the new third baseman, and that part of the equation has at least worked out since Paredes is off to a great start in his first year in an Astros uniform.
To fill first base, then, the Astros seemed to be solidifying things quite nicely with Walker, a two-time Fielding Bible Award-winning defender. Walker had also hit .253/.332/.464 with 141 home runs over 3171 PA for the Diamondbacks from 2019-24, posting above-average offensive numbers except for his injury-marred 2021 campaign. He was showing no signs of slowing down as he entered his age-34 season, and in the eyes of many observers, Walker was a much surer thing at first base than Pete Alonso, who is four years younger and had to wait much longer than Walker did to land a new contract.
The 36-29 Astros are in first place in the AL West, and appear to be once again lining up to make a run in October. The 2025 season is also only 65 games deep, so we’re still dealing with relatively small sample sizes when discussing players who are or aren’t performing well. Yet, even with the caveat that Walker’s slow start isn’t really holding the Astros back to any great extent, it still isn’t good that his performance has suddenly cratered over his first two-plus months in Houston.
Through 260 plate appearances, Walker is hitting .207/.269/.350 with eight home runs, and only 16 qualified players have a lower wRC+ than Walker’s 76 figure. His 6.2% walk rate and 27.7% strikeout rate are each far below the league average, and on pace to be Walker’s worst BB% and K% rates over any of his full Major League seasons. Walker’s barrel and hard-hit ball rates are slightly down from his 2024 numbers but are still solid, yet his Isolated Power metric has plummeted from .217 in 2024 to just .143 in 2025.
A .258 BABIP is part of the problem, so again, it is certainly possible Walker’s numbers might normalize once more of his hard contact starts translating into hits. However, Walker is chasing more pitches out of the zone than usual, and his 47.9% pull rate is well above the 42% pull rate he carried into the 2025 season. One interpretation could be that the right-handed hitting Walker is focusing a little too much on taking advantage of Daikin Park’s short porch in left field, yet his splits pour cold water on that theory. Walker is hitting .250/.321/.431 at his new home ballpark, and only .165/.217/.273 on the road.
Another set of splits might offer another hint, as Walker has a .662 OPS over 227 PA against right-handed pitching and a .320 OPS in 33 PA against left-handed pitching. Walker’s career splits against righties and lefties are almost exactly even, yet his lack of production against southpaws (when he should have the advantage) may not stand out as much as how rarely Walker has gotten to face left-handed pitching.
This could be a bit of a statistical fluke, but the Astros’ overall lineup is absurdly lopsided in favor of righty bats. With Yordan Alvarez and Taylor Trammell on the injured list, rookie Jacob Melton and two backup catchers (Cesar Salazar and the switch-hitting Victor Caratini) provide the only left-handed balance in Houston’s current mix of position players. Opposing teams have little reason to deploy their lefty pitchers against the Astros’ phalanx of right-handed batters, and Walker may be having some trouble adjusting to this new reality.
If Walker’s batting numbers are a letdown, his glovework is perhaps more shocking than anything. Walker has produced -4 Defensive Runs Saved and +1 Outs Above Average over 543 1/3 innings at the Astros’ first base spot this year, down from a +7 DRS and +13 OAA in 2024. Adding to this puzzling situation is the fact that Walker is now suddenly a relative weak link on one of baseball’s better defensive teams — Houston ranks second in baseball in OAA (18), and Fangraphs’ overall defensive ranking system puts the Astros ninth in the league.
The overall result for Walker is a -0.3 fWAR to show for his first 63 games with the Astros. Needless to say, it is not what Houston expected from its biggest free agent signing, especially since inking Walker cost the Astros not just $60MM but also two compensatory draft picks, since Houston exceeded the luxury tax threshold in 2024.
Perhaps if Abreu’s contract wasn’t still sitting on the Astros’ books, Walker’s performance could just be written off as a slump, or an adjustment period for a player moving to the AL West after eight years in the National League. But, Houston fans can be forgiven for sounding some alarm bells over an underwhelming free agent first baseman, especially with Jose Altuve’s own struggles and Alvarez’s uncertain injury situation casting some shadows over the Astros’ good start. There is plenty of time for Walker to turn things around, of course, and to provide some more concrete evidence that Houston’s first base issue has been properly solved.
