The Tigers claimed Darnell (hip) off waivers from the Pirates on Wednesday.
Darnell spent most of the 2025 season at Triple-A Albuquerque in the Rockies organization, holding a 3.19 ERA and 63:19 K:BB over 53.2 innings. He had surgery in September to repair a torn labrum in his left hip, but the Tigers appear confident in his ability to make a full recovery.