Josh Ketroser, agent to Boston Celtics guard Marcus Smart, has left Wasserman. Ketroser confirmed he had left the agency but did not have any other comment. Ketroser is the latest agent to leave the basketball practice since Arn Tellem left in June 2015 to become vice chairman of Palace Sports & Entertainment, owner of the Detroit Pistons. The others include Tellem’s son, Michael Tellem, who now works at CAA Sports; James Dunleavy, who now works at Independent Sports & Entertainment; and Jason Glushon, who formed his own agency.