Roach is spot on about a couple of things

Mosley did indeed become an old man overnight. Anybody thats seen mosleys wars with vargas, wright, de la hoya etc etc will tell you that shane even in defeat has been able to stand toe to toe with his opponent and after taking a shot throw one right back at him. It just was not there on the night and mosley fought mayweather in straight lines.

Mayweather is indeed the smartest fighter in the game today and quite possibly of all time. He knows how to take his opponents strong points out of the equasion and neutralise his attacks through slick punching and not allowing himself to get drawn into a fight. Floyd has the gift of amazingly quick hands and while his footwork may not quite be that of floyd at featherweight he more than makes up for that with far superior power.

I cant look past pacquiao if they were to ever meet on his last 4performances he almost seems as if he is a class above every other fighter in the world right now. Mayweather wouldnt be able to take pac off the front foot because mannys speed and agility has him out of there before the opponent knows anyway. Floyd getting caught with good solid clean punches exchange after exchange would be fascinating because he would have to find a way to neutralise pacs blinding speed