mlive.com — After grinding out a unanimous decision victory over Miguel Cotto on May 5, Floyd Mayweather remains atop of Yahoo! Sports' pound-for-pound rankings, one spot ahead of rival Manny Pacquiao. Mayweather collected 29 of a possible 39 first-place votes from the media panel polled by Yahoo!'s Kevin Iole, and Pacquiao received the other 10.