HBO has unveiled the official trailer for Ballers, a new series executive-produced by Mark Wahlberg and his fellow Entourage producer Stephen Levinson. The show stars Dwayne Johnson as a retired professional football player, Spencer Strassmore, who now works as a high-profile sports agent. Johnson's supporting cast includes Omar Benson Miller, John David Washington, Rob Corddry and LeToya Luckett, who portray assorted sports agents and football pros, both active and retired. Ballers premiers on June 21. Check out the video below.