Comedian and actor known for his work on an HBO sketch comedy program called Mr. Show with Bob and David. He also appeared on Malcolm in the Middle.
Early in his career, he played the role of Phil in a 1996 episode of Men Behaving Badly.
He taught acting at the Lee Strasberg Theatre Institute in Los Angeles, California.
He was born in Needham, Massachusetts.
He appeared in the 2007 Jake Gyllenhaal film Zodiac.