About Mike Hagerty
Michael Gerard Hagerty 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 became known for his mustache and thick Chicago accent. Hagerty was also a regular on The George Carlin Show, which was his first recurring television role.
Biography source: Wikipedia. The profile adds birthday-specific historical context from the Celebs Birthday Today editorial database.