according to Yahoo sports! UFC's Brock lesnar joins Mike Tyson as biggest ppv draw ever in sport

Boxers Floyd Mayweather Jr. and Manny Pacquiao produced the two biggest individual pay-per-view events of 2010. But with Brock Lesnar as the biggest overall draw, Zuffa LLC, the parent company of the Ultimate Fighting Championship, had its third consecutive record-setting year as the dominant force on the North American pay-per-view scene.
Zuffa is estimated by industry sources as doing 9,145,000 buys and generating $411 million in gross pay-per-view revenue on 16 events in 2010, including five that topped 750,000 buys. Those would consist of 15 events under the UFC banner and the lone World Extreme Cagefighting pay-per-view in April.
Lesnar fought twice over the past year, doing an estimated 2,100,000 buys combined for his main events against Shane Carwin on July 3 and his title loss to Cain Velasquez on October 23. In doing so, he became the second man in history to have two shows top 1 million buys in the same calendar year. The only other person to do so was Mike Tyson, who had three one million buy shows in 1996, in fights with Evander Holyfield, Frank Bruno and Bruce Seldon.