The Astros are placing outfielder Michael Brantley on the injured list. Houston made the move Wednesday as Brantley is dealing with right knee discomfort. He left Saturday's game against the Angels with knee soreness and had missed three straight games for the 'Stros. Brantley is batting .315 with eight home runs and 45 RBI this season. Houston also moved reliever pitcher Rafael Montero to the 60-day IL, putting an end to his season.