During the post-fight press conference, Floyd Mayweather, who had just finished unifying the 147-pound titles with a unanimous decision win over Manny Pacquiao, said he would relinquish his titles on Monday.
The announcement came out of nowhere and was done very as-a-matter-of-fact by Mayweather, who added that his final bout in September would be a non-title fight, though he says it would still be a 12-rounder.
Mayweather (48-0) holds the WBC, WBA and WBO welterweight titles.