Nothing really. it's a big challenge due to size alone and a W over Floyd helps Canelo's status more than it hurts Mayweather's.
Somewhere between the top two options. He's definitely a cherry picker, but Canelo is a big, young guy.
I think it would because Canelo is going to loose fights as soon as he moves up in class. He wins his fights but his defense isn't his strong point. He looks really bad at times not keeping his hands up and gassed. In the next 2 divisions expect to see him sleep during a fight or 2. Chavez Jr. and Ward will sleep him!
It would mean he wasn't the real Jr. MW champion ever because he never beat teh best Jr. MW champion within his career.
IF he lost, people 20 years in the future would look back and see this fighter who went 44-0 and finally lost after turning 36 and 17 years as a pro vs a 23 year old who out weighed him by 22 pounds.
This is what I want haters to acknowledge but I know they won't. If the roles reversed Floyd would be called out for "picking on a old, smaller opponent"
it will help his career! He'll fianlly lose and then fight a rematch then maybe a 3rd fight for everything. greatly help his careerr
It wouldn't effect his legacy one bit, Dude is already established. Him losing to Alvarez is what is supposed to happen. (Keep this game moving)