Cotton is ranked as the Dodgers' ninth-best prospect. Anderson, a former first-round Draft pick, is ranked No. 17, De Jong No. 20, Rhame No. 22 and Farmer No. 30.
Dirks had a back injury since the beginning of camp and never appeared in a game.
Ken Gurnick is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.