If it was announced Haye v Amir Khan people would say it was April fools day. That weight difference would be 6 six stone, whereas tomorrow's weight difference is 7 stone What is the biggest weight difference recorded in boxing?
You do know that a 46 year old Evander Holyfield fought and beat "The beast" last year right..? And Evander Holyfield was even lighter than David Haye...! How we forget the WARRIOR!
I am guessing Valuev vs Barrett is the biggest difference in weight ever, although I don't know. Edit: Forget that, he fought someone (Uysal) who was under 190 pounds! And he was 348 pounds himself!