Should Cotto be ranked higher than sixth on the list? Perhaps he should and a argument can be made for it. Should Cotto be ranked higher than Pacquiao? That's a big maybe.... or maybe not. If the two of them were naturally of equal weight, I think Cotto would beat Pacquiao, but the pound-for-pound ranking doesn't seem to go by argument. The rankings are pretty much done by record and what the fighter(s) have done recently. Because of that, Pacquiao rank is higher than most, including Cotto, due to his wins over Barrera, Moralez and now Marquez, some of Mexico's best fighters today. When ESPN and others are ranking Cotto, the only megastar names they see on his resume are Mosley and Judah.
Is the way the rankings are done fair? Probably not, to some.... but that's how it is.