Loperfido was removed from Saturday's game against St. Louis with left adductor discomfort, Mike Wilner of the Toronto Star reports.
Loperfido appeared to be grabbing at his hip after hitting a double in the third inning of Saturday's contest, though he managed to stay in the game until the fifth frame. If his injury proves to be severe enough to prevent him from playing Sunday, Nathan Lukes would likely be the next man in line to start in left field.