Getty Conor McGregor Suffered Horrific Leg Injury On This Day in 2021 It’s been four years since UFC 264, where Conor McGregor last competed inside the octagon. A horrific injury in the main event against Dustin Poirier  halted his career. The McGregor vs. Poirier trilogy fight generated plenty of interest. Both held one win each, making their main event bout a decisive tie-breaker. The winner would also establish themselves as a top contender and likely earn a lightweight title shot. McGregor