The Tigers placed Finnegan on the 15-day injured list Thursday, retroactive to Wednesday, with left groin inflammation.
Finnegan struggled in his last two outings Monday and Tuesday, giving up four earned runs on six hits with one strikeout across 1.1 frames in Toronto. The veteran right-hander will miss the rest of the regular season and has likely already thrown his last pitch of 2026 since Detroit's playoff hopes are hanging by a thread. In a corresponding move, the Tigers recalled Ty Madden from Triple-A Toledo.