X-rays on Petty's shoulder came back negative Thursday but he will undergo an MRI on Friday, Manish Mehta of the New York Daily News reports.
Petty exited Thursday's in the early goings after taking a hard hit, which opened the door for rookie Christian Hackenberg to see most of the playing time against the Eagles. While it's a good sign that Petty's X-rays came back negative, Friday's MRI will shed light on the full extent of his shoulder injury.