May's "Fight of the Century" might have been a dud in the eyes of many, but it made a gigantic amount of money for everyone involved. 4.4 million pay-per-view. buys. Almost 600 million in revenue. And the two fighters involved in the bout, Floyd Mayweather and Manny Pacquiao, are getting a large chunk of that near 600 million.
According to ESPN, Floyd will get at least 220 million due to the agreed-upon 60/40 split with Pacquiao. It could be up to 230 million. Manny will make in the neighborhood of 150 million. That's more than almost every other athlete makes in an entire career.
The reason the numbers aren't firm is because there isn't an exact confirmed number of PPV buys yet. There was enough data to announce a number (the 4.4 million), but not enough to be finalized.
There is a big difference between the two though - Floyd doesn't have to cut a check to a promoter, since he promotes himself. A large portion of Pacquiao's purse will be taken by Top Rank, his promoter. There are also the slew of lawsuits (currently numbered at 41) against Pacquiao and Top Rank for failing to disclose Manny's shoulder injury before the bout.
Mayweather, who won the bout via unanimous decision, is currently doing his usual song and dance regarding an opponent for his expected September date. Pacquiao will be on the shelf for a while after his shoulder surgery.