Anecdotes

Has appeared in five Coen Brothers films: Miller's Crossing (1990), Barton Fink (1991), Le grand saut (1994), The Big Lebowski (1998) and The barber: l'homme qui n'était pas là (2001).

Was not re-hired for the second season of Homicide (1993) because the network wanted to add a female cast member.

Attended Villanova University on a drama scholarship, graduating on the Dean's list. From there, he began a successful lengthy run on the New York stage both off and on Broadway.

Christopher Guest directed Jon in a commercial for the Resorts Casino Hotel in Atlantic City, New Jersey. His first Broadway job was when he was 26 years old and was hired as standby for 45-year-old Kenneth McMillan in the original production of David Mamet's "American Buffalo".

Won the Best actor OBIE award for five different performances in the 1979/1980 off-Broadway season.

Brother of animator and director Jack Polito.

Originated roles in the plays "The Transfiguation of Benno Blimpie", "Gemini" and "Other People's Money".

Was considered for the role of Captain Spaulding in La Maison des 1000 morts (2003), which went to Sid Haig.