No. 9: Juan Manuel Marquez Won't Carry the Extra Weight Well
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It's unfortunate for Pacquiao that a victory over Marquez will be marred by a bunch of excuses, including Marquez moving up nearly 10 pounds in weight since his 2010 fight with Katsidis to fight at 144 pounds. Marquez would never admit to the weight being a problem, but the critics will.
The only thing we have to measure how Marquez handles moving up in weight is his 2009 loss to Floyd Mayweather Jr., and it's hard to gauge just how much the weight was a problem versus Mayweather's superior skills.
The last time Marquez and Pacquiao fought each other, it was at the super featherweight level of 130 pounds. When both moved up in weight, it was Pacquiao who carried the weight better, while Marquez had his best performances at lightweight.
On top of just being able to fight at a heavier weight, Pacquiao has been fighting opponents who have weighed just as much or more than him.
That's something Marquez won't be used to, and he will have to get used to it quickly when he is in the ring with Pacquiao.