Floyd Mayweather vs Joe Calzaghe how long would floyd last????

i agree. bigger does not mean better. floyd has the skills to kill feather fist and i'm sure he will. floyd's never been hurt at welter weight, jr. middleweight, and calzaghe hits with the same strength of an average middleweight. hopkins exposed calzaghe as good, not great, and boxed the socks off him for the first 7 rounds before getting tired, low-blowed, and screwed by the judges. floyd wouldn't have stamina issues, would dodge any damaging blows, and counter. calzaghe was open for the same punch that knocked him down throughout the first several rounds. hopkins was simply too old to exploiot it. mayweather wouldn't have that problem. floyd at 154 vs calzaghe at 168 is floyd all day. calzaghe had to hit jones 300+ times and still couldn't knock him out.