Petty exited New York's 34-13 loss with a chest injury after he was sandwiched by Dolphins defensive ends Cameron Wake and Ndamukong Suh on a hit early in the fourth quarter. The Jets quarterback went to the locker room soon after and did not return. Todd Bowles said the quarterback will undergo more tests on Sunday. The tests will include a CT scan to see if he has an injured lung, NFL Network Insider Ian Rapoport reported.
"I'll be good," Petty told reporters after the game. "A little sore right now. I'll be fine."
Petty was replaced by former starter Ryan Fitzpatrick. Saturday night's test was Petty's third start of his career and his second since being pronounced the starter over Fitzpatrick by Bowles.
Before his exit, Petty was 20-for-36 for 235 yards, one TD, two picks and a fumble.