Floyd was willing to fight Cotto at 154; what makes Canelo any different?

By Dominic Sauboorah: WBC Welterweight champion Floyd Mayweather (44-0, 26 KO's) has recently stated how he will only fight Saul Alvarez (43-0 31 KO's) at the 147 lb. limit and not Alvarez's natural weight of 154 lb. That's unlikely to happen, considering that Alvarez is naturally a middleweight so it'd take a lot out of