2. Conor McGregor
McGregor was arguably the UFC’s first mainstream superstar. The Irishman was a two-weight champion and had incredible charisma. But he went from hero to villain with his antics outside of the cage when punched an old man in a bar (via Daily Mail).
Meanwhile, he became involved in multiple unsavory legal issues. These included sexual assault allegations and multiple speeding offenses. A woman also accused him of impregnating her at a party in Liverpool.
