Wayne Gretzky
Fly on the Wall with Dana Carvey and David Spade
00:00
The Greatest Athletes
"I always say that Ali, Jordan and Tiger were the three greatest athletes that I ever saw," David Letterman says. "There's so many great athletes. It's like your business. Can't just sit there and say, well, this guy is the greatest ever." 'If you don't believe me, ask him,' he adds of Kid Rock.
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