I've always felt that Whitaker-Chavez and Lewis-Holyfield I were the two that really stand out from the last few decades.

Both were horrible decisions, and more importantly, both occurred in huge megafights that were really important to the sport. Lewis-Holyfield was for the undisputed heavyweight title, and Whitaker-Chavez was supposed to determine the undisputed #1 PFP fighter in the world.

I would say that Whitaker-Chavez should go down as being the worst of the two, because at least Lewis got the chance to fight a rematch and get his victory. Chavez wanted no part of a rematch.