Muhammad Ali TKO Joe Frazier ( ditto )
Ruben Olivares vs. Chu Chu Castillo 1 and 2 ( both were bruised, cut and bloodied )
Don't know about the bloodiest, but the beating that went on forever was Larry Holmes--Tex Cobb, that Ref, should've been fired from the sport after that fight. (It's the reason Howard Cosell quit doing boxing)
I forgot the opponents name, but it was Muhammad Ali and....UGH!! i really forgot that guys name. It was a person he fought alot. If you type it up online or something, you'll know exactly what i am talking about. But that to me was the bloodiest boxing match ever. It was grueling.
sonny liston vs chuck wepner
muhammad ali vs henry cooper 2.
harry greb vs gene tunney 1
jim jeffries vs sailor tom sharkey
larry holmes vs tex cobb
also the ward vs gatti trilogy.