Former two-division UFC champion  Conor McGregor was expected to make his long-awaited return to the octagon on June 29 against  Michael Chandler .  After a press conference in McGregor’s hometown of Dublin, Ireland was  abruptly canceled hours before it was scheduled to happen earlier this month, rumors began to swirl that McGregor may be out of the fight.   On Friday, those rumors were confirmed when UFC CEO  Dana White officially announced that  McGregor had been injured and was out of the UFC 303 main event.  White did not provide details about the injury or its severity