John Kassir

John Kassir (born October 24, 1957) is an American actor, voice actor, and comedian. He voiced a possum in the season 10 episode "Marge Simpson in: "Screaming Yellow Honkers"", a donkey in the season 13 episode "Jaws Wired Shut", and Duff McShark in the season 14 episode "Old Yeller-Belly".