Ring Magazine are rapidly loosing credibility with regards to there rankings. They have Pacquiao #1P4P and Mayweather #1 welterweight, In my opinion they are both competing in the same division, so if one is above the other in the division it must be the same for the pound for pound.
But once again we have ring magazine sitting on the fence, trying to please all fans. Have Pac Man number one pound for pound to keep the Filipino fans happy, then put Mayweather no 1 welterweight to keep Mayweather fans happy. This is total BS
