10. Jim Harbaugh (1997)
Harbaugh was the Indianapolis Colts’ starting quarterback in the late nineties when the franchise ran into tough times. They were 0-7 in 1997 when the QB had a run-in with Jim Kelly. The Bills’ icon was working as a broadcaster when he found himself face-to-face with the younger man. An emotional Harbaugh proceeded to question Kelly’s toughness before he punched him in the face.

But Harbaugh came off worse because he suffered a fracture in his throwing hand. Not only did he come off as the aggressor but the result was ridiculous. Harbaugh refuses to go into detail about the incident because it was embarrassing for him. But there’s no doubt that Kelly thinks about this fondly. Finally, Harbaugh missed a month of the season (via IndyStar).