The Cardinals placed Romero on the 15-day injured list Wednesday with left forearm flexor inflammation.
Romero doesn't appear to be dealing with any structural damage to his pitching arm, but the injury will prematurely end his 2024 campaign. The setup man enjoyed a successful season, finishing with a 3.36 ERA, 1.15 WHIP and 51:16 K:BB over 59 innings. He scooped up seven wins and was credited with 30 holds and one save.