A legendary stand-up comedian, George Carlin may be best known for his routine about the seven dirty words you can't say on radio or television. It was the subject of a U.S. Supreme Court case. His observations about politics, religion and modern culture have kept him on comedy's cutting edge for several decades. A love of language and wordplay are a constant theme throughout his work. You can see it on display in this bit about the difference between baseball and football.