Conor McGregor made a not-so-successful return to the UFC after overcoming a life-altering injury that threatened to bring an end to his career entirely. Despite marketing his first octagon appearance in five years as the greatest comeback in sports history , an Islam Makhachev accusation may now have brought to life the Irishman’s true intentions. ‘The Notorious’ saw his break from competing end in disastrous fashion when he injured his leg within the opening seconds of the fight last month.