Mike Tyson has since apologized to Evander Holyfield and the public. He has promised to seek psychological assistance. He has not had the most stable of upbringings, having been arrested dozens of times while growing up in a Brooklyn ghetto. After the death of his original trainers, Cus D'Amato and Jim Jacobs, he has been surrounded by influence of Don King and his goons, who view Tyson as a cash cow. Evander Holyfield had head-butted Tyson repeatedly in the first fight and caused a major gash over the left eye of Tyson, enraging the individual.
Fights happen all the time in hockey.
Brawls occasionally break out in basketball and baseball. Roberto Alomar spit on an umpire. Granted, none of these acts in and of itself compare to the violence of biting a man's ear off, but also take into account the levels of violence in each of these aforementioned sports relative to boxing. Then, for what they have done to the faces of opponents, Marty McSorely or Dale Hunter should have banned from hockey. Then, Mr. Alomar should have had a more severe punishment.