Played guitar in a cover band called the Knight Ryders during high school. He left the band for college and soon after, all but one of the remaining band members were killed in a car accident on their way home from a gig.
Once performed stand-up under the name "Banjo Bill" Sadler.
Won a Clarence Derwent Award and a Drama-Logue Award in 1985 for his portrayal of Sgt. Toomey in Neil Simon's Broadway hit Biloxi Blues, in which he starred opposite Matthew Broderick.