The Diamondbacks’ Late-Career Breakout Slugger

The Diamondbacks have had a decent second half. Despite dropping five of their last six games, they carry a 26-23 record with a +31 run differential since the All-Star Break. It’s not enough to get them near the playoff picture, but they’ve shown some signs of life heading into the offseason.

An otherworldly stretch from ace Zac Gallen has played a key role in the team’s solid run, but they also rank fourth in the majors in runs scored in the second half. Young outfielders Daulton Varsho, Jake McCarthy and (in a more limited look) Corbin Carroll have been excellent, and they’ve gotten the continuation of what seems to be a late-career breakout season from first baseman Christian Walker.

Walker has popped 10 home runs and owns a .286/.348/.497 line since the All-Star Break, building off what was an already solid first half. While he only hit .204 through the year’s first few months, he connected on 22 longballs and walked at a robust 13.5% clip. His walks have come down lately, but he’s also trimmed his strikeouts and is now seeing much better results on balls in play. For the year, Walker owns a .235/.329/.474 line that’s a ways better than the .243/.312/.396 league average showing.

A former fourth-round pick of the Orioles, Walker developed into a fairly well-regarded prospect. He never got an extended look in Baltimore, and he eventually made his way around the waiver wire in Spring Training 2017. The South Carolina product wound up with the Diamondbacks after a nomadic few weeks, with Arizona finally succeeding in running him through outright waivers. After a year spent mostly in the minors, Walker made it back to the big leagues. He lost most of 2018 to injury but has played the past four seasons as the Snakes’ primary first baseman.

For much of that tenure, Walker has been a slightly above-average hitter. He connected on 29 longballs in 2019, but that came in the most homer-happy season in league history. His overall .259/.348/.476 line that year translated to a 111 wRC+ that indicates he was 11 points better than league average — solid, but not eye-popping production for a first baseman. Walker had similar results in the abbreviated 2020 season before stumbling to a subpar .244/.315/.382 showing through 445 plate appearances last year.

With rookie Seth Beer on the doorstep of the majors as a first base/DH option, it was fair to wonder whether the Diamondbacks would keep Walker around. Arizona’s front office maintained…