When former interim lightweight champion  Dustin Poirier entered the octagon against  Benoit Saint-Denis at UFC 299 in March, he was coming off a knockout loss to  Justin Gaethje in his previous fight.  It could have gone one of two ways: Poirier could have lost back-to-back fights for the first time in his career, or he could’ve dispatched the rising star.   Saint-Denis had the opportunity to become a contender and jump in the rankings