Perez has been diagnosed with a right elbow impingement, 680 The Fan's Kevin McAlpin reports.
The Braves are not ruling out Perez returning this season, but that seems like a bit of a long shot. He was removed from Sunday's start with what was initially thought to be a triceps injury. Tyrell Jenkins is an option to be recalled from Triple-A Gwinnett to slot into Perez's rotation spot.