Robles exited Tuesday's game against the Red Sox due to a hip injury, Daniel Kramer of MLB.com reports.
Robles had gone 2-for-5 with three runs scored and a steal before his hip forced him out of the game in the eighth inning. Manager Scott Servais said after the game that the outfielder's hip has been giving him problems for a while, and he'll most likely sit down for Wednesday's series finale in order to recover. Cade Marlowe would likely be the choice to start in center field if Robles is out.