
Acting
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.

Grey's Anatomy
2005

CSI: Crime Scene Investigation
2000

American Dad!
2005

Desperate Housewives
2004

Friends
1994

Seinfeld
1989

Star Trek: The Next Generation
1987

Monk
2002

Married... with Children
1987

Brooklyn Nine-Nine
2013

Curb Your Enthusiasm
2000

Cheers
1982

ER
1994

Ghost Whisperer
2005

Medium
2005

Glee
2009

The Goldbergs
2013

Boston Legal
2004

Community
2009

The Drew Carey Show
1995

Entourage
2004

Angel
1999

The Wonder Years
1988

The Mindy Project
2012

Family Ties
1982

Good Luck Charlie
2010

Arli$$
1996

Murphy Brown
1988

Martin
1992

7th Heaven
1996

Deadwood
2004

Happy Endings
2011

Ally McBeal
1997

Dear John
1988

The Wayans Bros.
1995

Crime Story
1986