Sport: Baseball
Career: 1984-2007
Cockiest Quote: "My only day off is the day I pitch."

Clemens was a rare athlete, so gifted that he played baseball on his own terms. He had the confidence to demand $22M from the Astros and didn't even travel with the team, he was conceited enough to lie about his steroid use, and had the balls to say "I thought it was the ball," when he took Mike Piazza's shattered bat and threw it at him during the '00 World Series. Why, if he thought a foot-long piece of wood was a baseball, would he throw it at a six-foot-three catcher? Because he's one cocky a-hole, that's why.