Former interim lightweight champion  Dustin Poirier will make the walk to the octagon on Saturday for the UFC 318 main event for the final time. “The Diamond” faces former featherweight champion and current ‘BMF’ titleholder  Max Holloway in a trilogy bout.  The trilogy fight comes 13 years after the two met for the first time in a featherweight match at UFC 143 in February 2012. Poirier handed Holloway his first career loss that night in Las Vegas