Character actor Mike Hagerty graduated from the University of Illinois and started out professionally as a member of Second City. With his large build and deep voice, he naturally gravitated toward tough guy and comedic roles, combining both attributes to great effect in a memorable episode of Cheers ("Strange Bedfellows, Part 1"). But it was as comically irascible building superintendent Mr. Treeger on Friends that Hagerty became well-known to a mass-network audience. Hagerty's later roles include a regular stint on Lucky Louie and guest appearances on shows such as CSI and Glee. ~ Bruce Eder, Rovi