The team announced the move in a brief statement while traveling from Kansas City to Anaheim. The Royals open a three-game series against the Angels on Friday.
Utility man Jimmy Paredes was recalled from Omaha in a corresponding move.
Moustakas has been the everyday third baseman the past two seasons, but he’s struggled to live up to expectations. He hit.233 with 12 homers and 42 RBIs a year ago.