Conor McGregor has announced his retirement for the third time in four years. McGregor abruptly made his latest dubious declaration Sunday morning on his Twitter account, where the former two-division UFC champion also announced his retirement in 2016 and 2019. Hey guys Ive decided to retire from fighting, McGregor wrote in a caption below a photo of him and his mother. If Conor McGregor feels he wants to retire, you know my feelings about retirement, White said. McGregor made his first Twitter retirement announcement in April 2016 during a spat with the UFC over promotion of his rematch with Nate Diaz.