Well to be fair who is the best guy Mayweather has beat at 147 i dont really see to many greats on the resume its kinda of weak one. If 135 is his best weight then you saying JLC beat a prime Mayweather and had a close rematch with him i am not sure that is Mayweather's best weight. Leonard was only in his 14 fight when he fought his dad and beat his ass bad. Leonard's power and speed would make a huge different in the fight plus he may not be as good in the defense but i fell he is leagues ahead in the offense department. I mean he adjusted to some of the greatest fighters to ever step foot in a ring.