Kevin Garnett, Basketball
Kevin Garnett was one of the most thoughtful, cerebral, and hard-working players off the court, and a certified maniac on it. Garnett played the game with an intensity that virtually nobody in the NBA has — or ever will — played with. And that intensity included using trash talk to psychologically demoralize his opponent. This is a guy who was able to rattle the seemingly unflappable Tim Duncan (who reportedly couldn’t stand Garnett’s antics), and is alleged to have called former NBA player Charlie Villanueva a “cancer patient,” as a taunt towards Villanueva’s physical appearance.