It's no secret that most fighters will gain lots of weight after their fighting days are over. Look at Tyson, Erik Morales, and Roberto Duran. At the other side of the spectrum, there are guys like Sugar Ray Leonard and Floyd Sr. that look like they could step in the ring today.
After their fighting days are over, which fighters do you think will get fat, and which ones do you think will stay relatively slim?
Fat:
Hatton - Obviously
Cotto - was once a fat kid. His love for food will be too much to overcome once he quits boxing.
Malignaggi - After he stops training, he will learn to inhale massive plates of spaghetti, ravioli, and pizza.
Arriola - umm yeah
Moseley - looks like he can tear up a dinner table
Slim:
Pacquiao - I just can't see a Fattiao
Mayweather Jr - It's in the genes
Khan - I don't think I've never seen an obese person of Pakistani descent
JMM - Nature's vitamin water supposedly does wonders to metabolism. It's got vitamins. Why waste them?