Mayweather landed more punches than McGregor -- -- in rounds six through McGregor was warned a few times through the fight for hitting behind the head, but no points were deducted by referee Robert Byrd. The Ring welterweight champion May 4, — September 12, Retired. After his fight with De La Hoya, Mayweather decided to relinquish his WBC light-middleweight championship,  retaining his welterweight title.
The Inevitable Spectacle of Mayweather vs. Pacquiao
Early in his pro career, Mayweather received praise from all corners of the boxing world and was touted as a pugilistic prodigy. Boxrec Boxing Encyclopaedia.