Michael Gerard Hagerty May 10 1954 May 5 2022 was an American actor He was known for playing comedic bluecollar workers including his recurring roles as Mr Treeger the building superintendent on Friends and the manager of a muffler shop on HBOs Lucky Louie Hagerty started acting after being invited by Jim Belushi to join the improv group The Second City He went on to cowrite and costar in three revues on the troupes mainstage during the 1980s Also Available in Paperback A Retrospective Orwell That Ends Well and True Midwest or No But I Saw the Movie He also introduced the lyrics of Bear Down Chicago Bears to its cast and had them memorize and sing the song He subsequently began acting in films and television shows beginning with Doctor Detroit in 1983 Hagerty became known for his mustache and thick Chicago accent Although the majority of his career was spent in television Hagerty had small roles in many films and ultimately garnered over 100 acting credits throughout his career He was recognized for his small character roles in a wide range of popular comedies including Martin Cheers The Wayans Bros Curb Your Enthusiasm Friends Seinfeld and The Wonder Years He was one of twenty actors to appear in both Friends and Seinfeld Hagerty was also a regular on The George Carlin Show which was his first recurring television role One of his final acting roles was Somebody Somewhere which he was still filming at the time of his death