Chief Mulrooney is an guest character in Fuller House. He is the new chief at the Fire Station that Tommy Fuller used to work at. On July 13, of 1991, Wake of San Fransisco was doing a segment on public servants with interesting hobbies, which he was accepted to go on as "The singing fireman". However, since Danny Tanner allowed "the breakdancing paramedic" do two numbers, the show ran out of time and couldn't feature him. He has never forgave Danny for this, and still holds a grudge.

He is portrayed by Patrick Gallagher.