He left the university in his junior year after he attended a performance of David Mamet's The American Buffalo at the St. Nicholas Theater. Inspired by the play, he enrolled in the theater's two-year theatrical training program in order to concentrate solely on acting.
He subsequently appeared for eight seasons as Ira Buchman on the NBC sitcom Mad About You, where he was nominated for four Screen Actors Guild Awards for Outstanding Performance by an Ensemble in a Comedy Series. He was a series regular on the Showtime/BBC series Episodes, playing American television executive Merc Lapidus. He has since appeared in numerous films and television series.
^Segaloff, Nat (1990). Hurricane Billy: The Stormy Life and Films of William Friedkin. New York: William Morrow & Company, Inc. p. 226. ISBN0-688-07852-4.