Juan Manuel Marquez says that even though his December 8 fight with Manny Pacquiao will be contested at the full welterweight limit, he's planning to keep himself a few pounds under that in order to retain speed and look for the KO:
"Although the limit of the fight is at 147-pounds, I won't weigh that much. I'm going to climb into the ring at 143 or 144 pounds, which is a weight where I physically feel better."
Marquez (54-6-1, 39 KO) came in at 142 pounds last November, but that fight had a contracted 144-pound catchweight. That's also the heaviest weigh-in of Marquez's career, tied with his 2009 loss to Floyd Mayweather, but to say that the bodies Marquez brought to the two fights were different would be putting it mildly.
It's not really any surprise that Marquez is planning to come in light. He's not a welterweight, and though Pacquiao actually came in at 147 pounds for the first time (his heaviest-ever weight) for his June fight with Timothy Bradley, it's unlikely there will be a substantial weight difference between the two on fight night.