If he was given one free punch at the opening of every round? Pac would be 147-148 on fight night. Sergio 168-170.
WTF Pac lands a lot more than one clean punch on Marquez per round. Why couldn't he KO JMM? Or even beat him? Oh but, but, but...styles makes fights right? Pac would and could beat someone who's bigger, faster, stronger, and just as intelligent as Marquez, not to mention Sergio is only one of the best fighters in the world.
If Pacquiao even had a chance at 160, he wouldn't be scared to fight him at 154. Because from what I hear from Pacquiao fans, it's much different than fighting Margarito at 154.