A's Call Up Colby Thomas After Surprise IL Move

The A's new addition can play a very specific role with the club

Sep 14, 2025; West Sacramento, California, USA; Athletics center fielder Colby Thomas (32) reacts after hitting a solo home run against the Cincinnati Reds during the fourth inning at Sutter Health Park. Mandatory Credit: Dennis Lee-Imagn Images | Dennis Lee-Imagn Images

Ahead of the finale of their series with the Seattle Mariners, the A's made a surprising outfield swap, bringing up Colby Thomas to replace Denzel Clarke, who has landed on the IL with a mid foot bone bruise in his right foot. There has been no context released for when this injury occurred or any potential timeframe for how long he'll be out.

Clarke has hit .170/.228/.189 so far this season in 53 at-bats and holds a .417 OPS. The bat hasn't been there for him just yet, but he's shown an increase in bat speed which could lead to positive results with some adjustments to his swing so that he doesn't pound the ball into the ground, as well as some improved pitch recognition so he doesn't chase sliders out of the zone.

Clarke's defense has been excellent, as expected, with +2 outs above average. When he's on the field, he's the best defender in baseball. It's his bat that has been holding him back from seeing that everyday playing time.

This week, while apparently dealing with injury, Zack Gelof had taken over in center for the first two games of the biggest series the A's have had at this point in the season. With Clarke out, the A's may have some flexibility to try a few options in center to see what their best alignment is moving forward.

In Wednesday's finale, Lawrence Butler will be getting a look in center, with Carlos Cortes in right and Shea Langeliers at DH in a day game after a night game.

Colby Thomas bringing slug to Sacramento

Sep 7, 2025; Anaheim, California, USA; Athletics right fielder Colby Thomas (32) runs after hitting a sacrifice fly to tie the game against the Los Angeles Angels during the eighth inning at Angel Stadium. Mandatory Credit: William Liang-Imagn Images | William Liang-Imagn Images

Starting the season in Triple-A Las Vegas, Thomas has been hot at the plate. He's slashing .309/.397/.574 with five home runs and a .971 OPS through 17 games with the Aviators. His strikeout and walk rates have also trended in the appropriate directions compared to his time in the minors last year, which is a positive step.

The one caveat with Thomas is that in his debut season last year, he excelled against left-handed pitching, while struggling mightily against righties. Versus southpaws, he hit .246/.304/.590 and held a 136 wRC+ in 69 plate appearances. In 63 plate appearances against righties, he hit .203/.226/.237 with a 23 wRC+.

Where this comes into play is that he can start against lefties, while also potentially serving as a pinch-hit option against left-handed relievers—a role Andy Ibáñez was expected to excel in this season, but he has gone just 2-for-16 (.125) so far. He's 0-for-1 against righties in 2026. Thomas will provide the A's another option in these scenarios.

With Gelof's new positional flexibility, that will allow the A's to find the best matchups available on a game-to-game basis, and Thomas could have a role to play when lefties are on the mound.

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