51.   He also took a head butt from Shawn Bradley, who drew a technical foul for it.

52.   He maintained a series of purposeful head butts by Holyfield caused the gash.

53.   He said the head butts in the first and second rounds caused blurred vision and tremendous pain and forced him to end the fight before the third round.

54.   He suffered a serious cut near the right eye, which he insisted was from a head butt.

55.   In the second round, Tyson was cut at the corner of the right eye by what Lane ruled was an accidental head butt.

56.   In their rematch in May, Chavez won only on a disputed ruling in a split decision arising from a head butt of Chavez.

57.   It was a rematch of a title bout in March in Japan which was suspended in the fourth round after Rojas suffered injuries from a head butt by Todaka.

58.   Jones rocked Del Valle several times and cut him over the left eye with an accidental head butt in the seventh round.

59.   Lane called it a head butt and halted it briefly to tell the judges.

60.   Ledon knocked down Garcia in the second and opened up a cut on his head with an accidental head butt.