I don't think you can say Roy Jones Jr, he never beat the same caliber of guys as Mayweather or pacquiao. Floyd actually going up to 154 and Manny fighting at 150 easily match or surpass Roy going to heavyweight consdering where they started and who they have been fighting. Roy honestly doesn't have the career to back him up if he was to be compared to these two, and I think if they met p4p he would lose because he never trained like these two do, he simply relied too much on things that these two have to almost equal degree as him which is speed, coordination and reflexes. Mayweather would outbox him, and Pacquiao would outfight him in an amazing fight. I mean just listen to people who have seen all the fighters of the past 30 plus years and they all say that nobody has been like Manny offensively. And statiscally nobody even Whitaker and Roy Jones have even come close to comparing to Floyd's defensive skill. I think you would honestly have to look at the very top guys ever to find guys in the same league as Floyd and Manny, and though I have Roy pretty high on my list in his prime, I don't think he or Whitaker truly had the opposition or all roundedness these two have developed. Whitaker didn't have that great speed, and he got hit a lot more than Floyd does, and he didn't have the offensive ability to dominate the same way Manny has. Roy has all the physical gifts, but he was more in there to put on a show than truly get down to business and I think his level opposition allowed for that, but it didn't force Roy to be the fighter he was capable of being, and it showed against some of the guys he faced.