Floyd Mayweather Jr. vs. Conor McGregor is quite possibly going to be the biggest-selling pay-per-view of all time. Mayweather already holds the current record, with his 2015 fight with Manny Pacquiao pulling in well over 4 million buys.
The very first PPV main event for Mayweather was on June 25th, 2005 at the Boardwalk Hall in Atlantic City, New Jersey. Floyd went into enemy territory to take on WBC 140-pound champion Arturo Gatti, who’d won five straight fights, including the last two of his epic trilogy with Mickey Ward (both non-title). Gatti successfully defended his belt against Jesse James Leija in January 2005, while Mayweather easily dispatched Henry Bruseles in the same month, thus setting the stage for this showdown.