Digging for a double, Detroit Tigers utility player Willi Castro pumped the brakes halfway between first and second base.
Castro reached for his left hamstring upon reaching second base safely with two outs in the fourth inning. Trainer Doug Teter checked on Castro and removed him from the game with a left hamstring strain.
The severity of his injury is unclear.
In the second inning, Castro collected his eighth home run of the season to give the Tigers' a 1-0 lead over the Kansas City Royals.
Castro, 25, is batting .