The uncertainty surrounding the 53-man roster is who will be the starting quarterback? Does incumbent Sam Darnold compete against rookie Matt Corral and former XFL star P.J. Walker for the job in training camp? Or do the Panthers add a veteran such as the Browns' Baker Mayfield or San Francisco 49ers' Jimmy Garoppolo?
The rest of the roster is stronger, so the success of this team depends on consistent play at quarterback that hasn't been there since the first half of the 2018 season with Cam Newton.
Here's a 53-man roster projection heading into the summer break:
QUARTERBACK (3): Sam Darnold, Matt Corral, P.J. Walker