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 ...

John Ratzenberger as Cliff Clavin on 'Cheers' in the 1980s Cheers wouldn’t have been the same without Cliff Clavin — and the beloved character wouldn't exist without John Ratzenberger's quick thinking ...

Cliff Clavin, a mailman from the TV series “Cheers”, has an idea to save the postal service. The actor, John Ratzenberger, recorded a message talking about the USPS and his plea to show support. "You ...