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Conor Anthony McGregor is an Irish professional mixed martial artist. He is a former Ultimate Fighting Championship featherweight and lightweight double-champion. He is the first UFC fighter to hold UFC championships in two weight classes simultaneously. He is also the former Cage Warriors featherweight and lightweight champion. As of 27 June 2022, he is ranked #12 in the UFC lightweight rankings.In his debut professional boxing match, he was defeated by Floyd Mayweather Jr.