Within his first year and a half of doing stand-up he was a regular performer at the Improv, Catch a Rising Star and the Comic Strip.
[3] He hosted Laffathon on Showtime 1980–81, Comic Strip Live on Fox 1987, You Asked for It Again on the Family Channel 1992.
[5] From 1992 until 2001 he appeared many times on The Tonight Show with Jay Leno doing stand-up, in written comedy pieces and in remote segments.
The Los Angeles Times Magazine called him "L.A.'s premier 'joke scientist' …dissecting, analyzing, adding or subtracting ingredients" in Leno's opening monologue.
Brogan also appeared in an episode of Happy Days entitled "Chachi Sells his Soul" as Random to cross promote his show.
[3] Brogan also appeared in major motion pictures including Punchline (with Tom Hanks and Sally Field) playing the younger clergyman; Steven Soderbergh's The Informant!