Angels pitcher Jered Weaver was forced to leave Monday's game against the New York Yankees in the first inning with a lower back injury.
Facing the fourth batter of the frame, Weaver suffered the injury on a called strike on his second pitch of Robinson Cano's at-bat.
He attempted a warm-up pitch after getting looked at by a trainer, but he left the game after appearing to be in discomfort on his follow through.
Weaver allowed a run and did not record an out on the four batters he faced.