Cheers wouldn’t have been the same without Cliff Clavin — and the beloved character wouldn't exist without John Ratzenberger's quick thinking, according to the actor. “So I was walking out the door, ...

The character of Cheer’s customer, know-it-all mail carrier Cliff Clavin, was portrayed by actor John Ratzenberger. The trivia espousing postman was often shown interacting with friend and fellow bar ...