Absolutely it's Mayweather's fault for making the demand. It's also his fault that Canelo accepted it. Canelo should be given a pass on this because he's a popular Mexican fighter with a huge following. Why should he be held to an "agreed-upon" weight? It's not fair. It's Mayweather's damn fault. He MADE Canelo agree to 152. Probably secretly held a gun to the kid's head.