26. Pete Rose
Everyone already knows about Rose being banned for betting on baseball, but dude was grimey way before then. Such was the case at the 1970 All-Star Game, when he rounded third and barreled into catcher Ray Fosse, who didn't even have the ball. Fosse suffered a separated shoulder and was never quite the same. Think Fosse cracks a smile each year Rose is ineligible for the Hall of Fame? Bet.