upset in boxing history?. . . . I could even find heavyweight title fights which were bigger. Mike Weaver KO win over John Tate for example. Tate was the undefeated champion and former Olympic Medalist while Weaver was coming off a loss in his last fight and had a record of 21-9. Big John outweighed Weaver 232 lbs to 209 and had a noticeable height advantage.. . . . . Yet the boxing world has adopted the idea that "Buster"s was a bigger upset. What other boxing matches would you consider greater upsets?