 He started the 2013 season with the Stockton Ports of the Class A-Advanced California League before being promoted to the Midland RockHounds of the Class AA Texas League.At the time of his promotion he was leading the California League with 21 home runs and 76 runs batted in (RBIs).In total, Muncy hit .273/.381/.476 with 25 home runs and 100 RBIs.