Tigers designate recent waiver claim for assignment

The Tigers announced that they have selected the contact of right-hander Geoff Hartlieb. Fellow righty Carlos Hernández has been designated for assignment in a corresponding move. Members of the Detroit beat, including Cody Stavenhagen of The Athletic, noticed earlier today that Hernández didn’t have a locker in the clubhouse.

Hernández, 28, was claimed off waivers from the Phillies just over a month ago. He got into 11 games for the Tigers but allowed 12 earned runs in 10 2/3 innings. There was surely some small sample weirdness in there. His .412 batting average on balls in play and 35% strand rate were both far to the unfortunate side. He didn’t help himself by walking 11.3% of batters faced but his 24.5% strikeout rate was solid.

Ultimately, it’s not a lot to go on, but the Tigers decided to make a change. Hernández pitched in each of the past two games and may not have been available tonight, so they’ve swapped him out for a fresh arm.

He’s likely to end up on waivers again in the next few days. He has shown promise at times in his career but has been inconsistent. He averages in the upper-90s with his fastball and sinker while also featuring a splitter, slider and knuckle curve. He posted a 25.7% strikeout rate with the Royals in 2023 but that dropped to 20.9% last year and is at 20.5% here in 2025. Though as mentioned, his strikeout rate spiked a bit with Detroit more recently.

Kansas City burned his final option year in 2024 and put him on waivers just ahead of Opening Day this year. The Phils grabbed him but he posted a 5.26 ERA before getting put back on waivers in June, which is when the Tigers grabbed him.

Though his 6.69 ERA on the year isn’t attractive, teams might be attracted by the stuff. He’s making a modest $1.16M this year and can be retained via arbitration for another two seasons after this one. Perhaps a club selling bullpen pieces ahead of the deadline might grab him for the stretch run, though he’s out of options and can’t be easily sent to the minors.

Hartlieb, 31, just signed a minor league deal with the Tigers less than two weeks ago. He has made two appearances for the Yankees this year but allowed three earned runs in each of them. He currently has a 40.50 ERA in 1 1/3 innings. Around those appearances, he’s been pretty good in Triple-A this year. He has 37 1/3 innings pitched at that level with a 3.13 ERA, 27.6% strikeout rate, 6.6% walk rate and 42.1% ground ball rate.

Like Hernández, Hartlieb is out of options and likely has a tenuous hold on a roster spot. But for now, he’ll give them a fresh arm for a key four-game series against the Blue Jays which kicks off tonight. Those two clubs and the Astros are leading the three American League divisions and are currently neck-and-neck for the league lead. The Jays and Astros are both 60-42 with the Tigers half a game back at 60-43.