Conor McGregor completely a successful 3-hour surgery on his broken leg Sunday following a gruesome loss to Dustin Poirier at UFC 264 . McGregor’s (22-6 MMA, 10-4 UFC) trilogy fight with Poirier (28-6 MMA, 20-5 UFC) was cut short when the former two-division champ broke his left lower tibia and fibula off a missed punch toward the end of the first round of the lightweight bout, which took place at T-Mobile Arena in Las Vegas.