
Mike Hagerty
Michael Gerard Hagerty (May 10, 1954 – May 5, 2022) was an American actor. He was known for playing comedic blue-collar workers, including his recurring roles as Mr. Treeger, the building superintendent, on Friends and the manager of a muffler shop on HBO's Lucky Louie. Hagerty started acting after being invited by Jim Belushi to join the improv group The Second City. He went on to co-write and co-star in three revues on the troupe's 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.
Known for

Grey's Anatomy
2005

American Dad!
2005

CSI: Crime Scene Investigation
2000

Friends
1994

Desperate Housewives
2004

Married... with Children
1987

The Goldbergs
2013

Star Trek: The Next Generation
1987

Star Trek: The Next Generation
1987

Seinfeld
1989

Glee
2009

Monk
2002

Cheers
1982

Ghost Whisperer
2005

Entourage
2004

Boston Legal
2004

Brooklyn Nine-Nine
2013

Curb Your Enthusiasm
2000

ER
1994

Community
2009

Medium
2005

The Drew Carey Show
1995

Murphy Brown
1988

Angel
1999