John Ratzenberger Directory References Images Discover 7 of History's Most Notorious Serial Killers What Is the Emoluments Clause? 7 Everyday English Idioms and Where They Come From Is Cinco de Mayo Mexico's Independence Day? 7 of the World’s Deadliest Plants How Deadly Is Quicksand? Timeline of the 2000s Contents John Ratzenberger American actor Ask the Chatbot a Question Ask the Chatbot a Question Learn about this topic in these articles:role in “Cheers” In Cheers…salt-of-the-earth mailman Cliff Clavin (John Ratzenberger).Read More