19. Richard Grant
In one of the ugliest moments in boxing history, James Butler sucker punched Richard Grant after losing to him. Their match was a charity event for 9/11 firemen and police survivors, mind you. The cheap shot resulted in an assault conviction and four month sentence for Butler. As if that weren't enough, in 2004, Butler was convicted of murdering Sam Kellerman, the brother of Max Kellerman, with a hammer because Sam wanted him to move out of his apartment. SMH x 100.