Photo by Mike Roach/Zuffa LLC Dustin Poirier really is going for the fairytale ending to his career with a fight booked against Max Holloway in his home state of Louisiana at UFC 318 . But if there’s one universal rule that seems to be true for MMA, it’s that no one is ever truly retired. While the entire pay-per-view card is being built around Poirier’s swan song, there are just too many examples worth mentioning where fighters say they’re done only to return for another fight