The Life and Fights of Conor McGregor. Notorious by name, notorious by nature, Conor McGregor is the main attraction in UFC, one of the biggest sports on the planet pulling in over 5 million viewers worldwide. Born in Dublin, McGregor began to box at a young age, training under Olympian Phil Sutcliffe. He made his MMA debut at the age of 17. McGregor's success is nothing short of extraordinary, having lost only three fights in his career so far. This is the first biography of McGregor.