The procedure at White Memorial Hospital in Los Angeles was performed by Dr. John Itamura and Dr. Neal ElAttrache.
Greinke was injured when he was charged by Padres outfielder Carlos Quentin, who had been hit with a 3-2 pitch with the Dodgers leading by a run. That triggered a bench-clearing brawl, for which Quentin was suspended for eight games and Dodgers utilityman Jerry Hairston was suspended for one game. The suspensions have been appealed.
Ken Gurnick is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.