How many losses should Mayweather have on his record?

[Beanz]

Which other "greats" started their careers at a lower weight than Mayweather and had sucess at middleweight?

Duran, Armstrong. Other guys like Gavilan and Napoles started in lower weight divisions than Mayweather started and although they weren't successful against the middleweight champ at least they had the balls to challenge themselves.

What weight do you suppose Gavilan, Duran, Armstrong, and Napoles' respective opponents were the night of their middleweight title fights?

Does it matter? they were all great fighters, the likes of whom, Floyd, whatever one thinks of him, never had a chance to face.