Buffalo Bills quarterback AJ McCarron suffered a hairline fracture in his collarbone during Friday night’s preseason game against the Cleveland Browns,  the next day he was back at it, even though he’ll be off the field for a bit. 

Per Rapoport and Pelissero, McCarron is slated to miss several weeks, but no exact timeline has been set for the signal-caller’s recovery. He’ll undergo further tests on Saturday. You can see AJ on the video below, he looks a bit surprised 

With McCarron likely sidelined for a bit, the Bills will have to decide whether Allen or Peterman will start the all-important third preseason game. The Week 1 starting gig is still up for grabs, though Allen is gaining some serious ground.