Conor McGregor is an Irish professional ... Crumlin Boxing Club at the age of 12 and made his debut in the UltimateFightingChampionship (UFC) in April 2013, defeating Marcus Brimage in 67 ...
UltimateFightingChampionship (UFC ... The mixed martial arts (MMA) brand has made household names of Irish fighter ConorMcGregor and female champions Ronda Rousey and Holly Holm.