what does calzaghe and mayweather have in common?

[Abstraction]

Mayweather was at several weight classes. He may have not fought the all of best at Welter, but guess what, that's because he was not a Welter. He did his job at 130 and 135 and has plenty of Prime v Prime wins

As for joe..lol.. I'm not even going to waste my time with joe