Manny Pacquiao has always believed he can do what 47 other fighters before him have failed to do — beat Floyd Mayweather Jr. in the ring. Turns out a lot of other people are believers, too. And they’re backing their opinions with real money. reports Inquirer.net. Pacquiao has already narrowed the odds for the big fight in Las Vegas' legal sports books. By the time they get into the ring May 2, it’s conceivable that Mayweather might not be favored at all.