Conor McGregor

Net worth: $200 million. McGregor earned $100 million from the Mayweather boxing fight alone and approximately $50 million from UFC. But his biggest payday was Proper No. Twelve Irish Whiskey: he sold his majority stake to Proximo Spirits (Jose Cuervo parent) for $600 million in 2021, pocketing an estimated $150 million. His record is 22-6 in MMA and 0-1 in boxing, but he's been the UFC's biggest PPV draw for a decade. McGregor proved that personality sells: his fight week press conferences generate more views than most fighters' actual bouts.