Man Sergio has to be at least 180s, he is big compared to Cotto. Cotto looks about 170's here.
I'm not used to see Sergio with body fat, but he does balloon in weight so that crap about him being a small 160 pounder is Bs, dude drains himself to make 154 and at 160 he has a low bodyfat with a skeleton face, at the presser for this fight he has meat on his face something we are not used to seeing with Sergio who usually has that lean face.
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