Who was the boxer, I think he was a heavyweight (was it McCall?) who quit in a fight because he had the shits? That'd be pretty hard to live down.
There's a hockey player named Patrik Stephan who had an empty net to shoot at (the other team had pulled their goalie) skated right up to its, then fell over and missed the net. The other team gets the puck, goes back up ice and scores, tying the game with a couple of seconds left. The worst part was that the Oilers were the team that tied the game... I hate them with the burning passion of 1000 suns...