Dalton turned the ball over three times during the game, and Canales said it could have impacted his play.
"I would imagine, it's on his throwing-side thumb, on his right hand," Canales said. "I just love when guys, ... he knew this was important for the team and he wanted to be out there for his guys to be able to give us the rhythm, to give us a chance to do it and to win, so I just applaud Andy for that and, you know, he gutted it out."
The Panthers have Mike White and Hendon Hooker on the practice squad, and if Dalton isn't able to go, they would need one to suit up Sunday against the Packers.
Hooker was elevated from the practice squad to back up Dalton Sunday against the Bills, and Canales said they were still talking about what to do there.