who played the abominable snowman in monsters inc
John Ratzenberger John Dezso Ratzenberger (born April 6, 1947)[1] is an American actor, voice actor, and entrepreneur. He is best known as Cliff Clavin in Cheers. He is also known for his extensive vocal work in Pixar Animation Studios' films, notably Hamm in the Toy Story franchise and Mack in the Cars franchise.