Because he always has foughten the best, and OScar is still in the top echelon of the sport, I mean besides Mayweather I don't see any other fighter really having an edge on Oscar, He definitely beats Margarito IMO, and Cotto against him would be a great fight, but just from seeing how close Cotto's fight wiht a 36 year old Mosley makes me think that maybe, MAYBE, Oscar might be too much for him.