Conor McGregor Ready to Fight Again in the UFC The UFC's lightweight champion is ready to renter the Octagon after falling to Floyd Mayweather in a high-profile boxing match last August. McGregor, 29, went off in a lengthy Instagram post, saying that he offered to replace Max Holloway in a bout against ex-lightweight titleholder Frankie Edgar. I was told there wasn't enough time to generate the money that the UFC would need. I am here. It is on them to come and get me. "Notorious" hasn't fought for the UFC since capturing the 155-pound title in a second-round TKO win over Eddie Alvarez in Nov. 2016.