WOuld have been interesting if it was actually true...
http://mashable.com/2014/02/02/floyd-mayweather-broncos-super-bowl-bet/
Actually it could still be true. Notice that Mayweather did NOT deny this report before the game. Only AFTER Denver lost did he deny it. It could be that Mayweather is embarrassed about his huge loss so he could be now pretending he never made the bet. Anyway, it is strange that he did not deny the reports BEFORE the game. The denial only came AFTER the game.