Petty briefly came on for the injured Ryan Fitzpatrick (knee) and completed both of his pass attempts for 19 yards during Sunday's loss to the Dolphins.
Fitzpatrick was able to come back into the game, which relegated Petty back to clipboard duty. The former is scheduled to undergo an MRI on Monday, and head coach Todd Bowles said he will start if he's healthy; however, if he is unable to play, Petty could get his first career NFL start in Week 10 against the Rams.