UFC Full Fight Download: Watch Michael Johnson Knock Out Gleison Tibau Sep 13, 2016 Watch Michael Johnson knock out Gleison Tibau at UFC 168. Related Articles Sherdog’s Official Mixed Martial Arts RankingsBeating the Odds: UFC Fight Night ‘Poirier vs. Johnson’Opinion: Money Fights and the Forgotten Art of Knowing One’s RoleThe Walkmen: UFC Fight Night ‘Poirier vs. Johnson’Matches to Make After UFC Fight Night ‘Poirier vs. Johnson’