Braves say Kris Medlen injured elbow ligament
Medlen had an MRI on Monday that revealed the injury, according to general manager Frank Wren.
Wren said Tuesday the 28-year-old right-hander and the team will seek a second medical opinion.
Medlen felt the injury on Sunday while pitching against the New York Mets. He grabbed the elbow with two outs in the fourth inning and left with a trainer.
Medlen tore his right ulnar collateral ligament while pitching against the Mets on Aug. 4, 2010, and was operated on by Dr. James Andrews that Aug. 18. Medlen didn't pitch for the Braves again until Sept. 25 the following year.
Brandon Beachy, another right-hander in Atlanta's projected starting rotation, left a game Monday because of tightness around his pitching elbow. Beachy has been limited to a total of 18 starts over the past two seasons.