I believe Calzaghe by decision.Not only is McClellan overrated,but Calzaghe had some very impressive footwork to go along with his excellent handspeed.I believe those 2 factors combined would have been too much for McClellan.
ok let me put it this way would joe have lasted with the same on slaught he took from kessler. remember g-man was a better boxer then kessler.
Tough but if GMAN jumped on Joe like he did Benn I don't know if Joe could deal with that .. I mean an old Jones ,Benrard Hopkins and Byron Micthell all dropped him ..Gman hit harder than all of them ..