11.   He was born to play for the embattled Butch Beard, not the empowered Pat Riley, no head butts about it.

12.   Holden and Smith attribute that to the numerous head butts Carver received in the first three rounds.

13.   I am inclined to suspect that the ninth-round head butt he suffered may have triggered his ensuing collapse.

14.   In boxing, head butts are a common occurrence.

15.   In an interview with The Buffalo News, Varada discussed the head butt.

16.   Included in their tallies was the point Whitaker had deducted by referee Mills Lane for a third-round head butt.

17.   Instead, it was a guy whose college career has been marked by more head butts than headlines.

18.   In their first bout, the little guys fought to a technical draw after the bout was stopped because of an accidental head butt in the seventh round.

19.   It banned head butts and groin strikes.

20.   Losing on points after two rounds and bleeding from an inadvertent head butt to the right eye, Tyson for the third round came out steaming.