So, I think we can safely assume Christian Walker’s first season didn’t live up to expectations. What was viewed as a steadying addition to the lineup last offseason ended up feeling more like a continuation of the supposed Yuli Gurriel curse. And I was perfectly fine with moving on from Gurriel after 2022; it’s not as if his performance since then has been worth losing sleep over in any case. Throw in José Abreu’s rather forgettable tenure and…you get the point. First base production for Houston has been lacking in recent years. Paying a combined $39.5 million to Abreu and Walker for only 1.1 fWAR, all from the latter, is an entirely inefficient use of resources.

Walker’s first season in Houston finished on a higher note than what his final stat line would suggest, though. Yes, throughout the entire season, he only had a 99 wRC+. An on-base percentage less than .300. It isn’t like we can wave a wand and ignore the bad. With only one win separating the Astros from qualifying for the postseason, it is entirely reasonable to assume that Walker playing a bit better in the first half helps close that gap. Maybe that even nets an extra win somewhere between Opening Day and early July. But we also can’t ignore the improvement, with a 120 wRC+ in the second half, with a noticeable increase in power.

That development was certainly encouraging. Still, if Walker remains with the Astros in 2026 — which feels far from guaranteed at the moment, depending on how the organization feels about him or Isaac Paredes — they’ll need him to deliver consistent production at the plate, not just for half a season. And when you dig deeper into the numbers, one concern continues to stand out: how he hits — or more accurately, how he doesn’t — at Daikin Park.

To be fair, his road numbers weren’t good early in the season. Walker was a rough watch for roughly half the season at the plate. But that second-half resurgence mostly took place on the road. Whiffs were generally lower than the rates at home, and the power rebounded. But his home numbers were still lagging for most of the season, including a persistent issue with elevated whiff rates and a relative lack of power. For example, of his 15 home runs in the second half across 240 plate appearances, 13 took place on the road. And the other two home runs did occur at home, but against the worst pitching staff in baseball, by far, in the Rockies. So, not exactly a ringing endorsement.

If Walker had stunk at home and on the road, we could then simply chalk up his lackluster 2025 season as being the one in which he began his precipitous aging curve decline. Take swing speed, for example. Walker, who will be 35 around Opening Day, saw his average bat speed decline from 75 mph in 2024 to 74.1 mph in 2025. His Fast Swing Rate dropped by 10.9% from one season to the next. But his Squared-Up and Blast metrics as an Astro, according to Statcast, are similar, if not better, than his numbers as a Diamondback in 2024. So, when he does connect, there isn’t much of a difference. That’s the good news. But, again, the bad news remains whether he can make contact for all of that to matter. We are talking about an aging hitter who walked less and struck out more than he has in any season in which he received regular at-bats. Even if he can still do something with the ball when he connects, it is an increasingly moot point if the rate of contact continues to fall.

This information at least suggests the question: Why is Walker having problems hitting the ball at Daikin Park?

I’ve long been cautious of using the batter’s eye as the primary reason why a hitter doesn’t hit well at Daikin Park. It isn’t a non-zero factor, to be clear. And there is a reason why the Astros adjusted the batter’s eye in center field in both 2023 and 2024. There are issues with it. But hitting is complex, too. Following Jeremy Peña’s evolution as a hitter since 2022 has humbled me immensely in this regard in recent years. It is rarely just one thing causing the success or all of the problems.

With that said, I think Walker’s performance at home, in light of how much his whiff rates differed at Daikin Park and on the road, at least invites speculation into the topic.

Dating back to Walker’s first season with regular at-bats in 2019, he never had a season before 2025 when he posted a home whiff rate higher than 28% at Chase Field. In his first season playing half his games in Houston, that home whiff rate climbed dramatically to 34.9%. For an older player’s whiff rate to suddenly spike approaching their mid-thirties isn’t a surprising development. A rise in whiff and strikeout rates is to be expected at this point in his career. But Walker’s road whiff rate actually declined, dropping down to only 22.7% in 2025. If we get more pitch-specific for a second — four-seam fastballs in the heart of the strike zone or in the upper region of the shadow portion of the zone — we see his away whiff rate is only 23.8%. At home, it climbs even more to 38%. That contrast on the surface at least suggests that all of his swing issues last season aren’t entirely exclusive to aging. I think it is within the realm of possibility that Walker simply isn’t seeing the ball at home as well as he does on the road. I don’t think he is the first Astros’ hitter to experience such issues, nor will he be the last.

The batter’s eye in Houston has been a source of frustration in past seasons. My memory might be failing me a little bit here, so bear with me. Still, I don’t recall many issues with the batter’s eye before the center field renovations started in the offseason following the 2016 season, which included the removal of Tal’s Hill. But because there have been tweaks here and there to help hitters, it isn’t outlandish to think that it is causing some issues for Walker. A new park, a new batter’s eye that he had little familiarity with. Those things over the course of a half-season worth of plate appearances matter. If Walker remains an Astro for 2026, it’ll be interesting what a larger sample size at Daikin Park would reveal. And if his road numbers stay within the realm of his career averages, but the home numbers continue to struggle, it will only invite even more speculation into the issue.