He is moving up because with his height he is struggling with the weight all the time. He will be natural LHW soon.
He does not need to take a step back and fight a nobody like margarito...Aint no money in that...he is the least of all the welters....He can move to 154 which he would probably be a lot better at and he is still young so he has time to fill in.. margarito could not get on the inside sooner...He could not handle the movement and was made to look like the sloppy wild slugger he is...He cant cut no ring off...lol....Big ass target like Williams was slipping and sliding his ass all around the ring and then finished the fight the stronger man when Margarito had nothing left in the 12th after "his I dream on a haymaker" round 11.