All of the greats knew that you had to open your soul and leave a piece of it in the ring. Mayweather has never done that.
Berto, a 2004 Olympian, was once thought of as a rising star but has lost three of his last six fights. Two of those losses were to Robert Guerrero and Victor Ortiz, fighters that Mayweather beat easily.
Mariano Rivera, the Final 42, sui generis of any generation, the man whose mythology isn’t hyperbole. To list his bona fides is to not only insult him and you, but also his peers, since he has none.
Guerrero believes he is the fighter who will be the first to beat Mayweather, and he’s eager to earn both the recognition and the money that would come with such a win.