Mike Tyson has been called a lot of things in his life, and now quitter will be added to the list. Tyson remained on his stool after the sixth round of his latest comeback bout, making a winner out of journeyman Kevin McBride in Washington D.C. on Saturday. Tyson headbutted McBride in the sixth, cutting McBride and earning Tyson a two-point deduction. Tyson went down just before the end of the sixth, but it was not ruled a knockdown.  Despite the two-point penalty for the intentional foul, Tyson was ahead 57-55 on two scorecards when he quit. The third judge had it even. According to the Associated Press, Tyson said he "most likely" would not fight again. However, the ex-champion is deep in debt, so his finances could mean yet another comeback, but in wake of his performance against McBride, he can no longer be considered even a fringe contender.