UFC chairman Dana White says Conor McGregor's career in the octagon may be over. McGregor has not returned to the UFC since his high-profile boxing match with Floyd Mayweather Jr. this past summer. According to White, the $100 million payday McGregor received from the Mayweather bout has factored into his slow comeback. He went on to add, "Fighting is the worst. Try to get up and get punched in the face for a living when you've got $100 million in the bank.