www.boxingalley.net www.facebook.com/boxingalley www.twitter.com/boxingalley Floyd Mayweather Jnr. is one of the pound for pound greatest boxers of all time. He's a fighter that uses what's known as the 'shoulder roll' to protect himself from his opponent's punches which seems to be a frustrating to his opponents, as it is effective. Wonder how we would go against Canelo Alvarez...