Mayweather is still hard to hit on the inside, and hard to hit to the body and has excellent counter uppercuts. In an inside fight Mayweather may well come out on top
Mayweather didnt drain to make 130, except in his last fight where he stepped in the ring at 138, Floyd was usually only 132-135 tops in the ring. Compare that to Corrales/Guzman/Pacquaio who would be in the mid 140s in the ring. Mayweather probably didnt drain any more than Saddler who was massive at the weight
It's not going to be an inside fight though. Saddler grabs you with his arm and hits you with the other. And he's not like Hatton either who smothers his own work. For a lanky man he sure could put a ton of power in that unorthodox short left uppercut of his.
Mayweathers pretty good at getting his elbows in the way, blocking bodyshots and the uppercut countering