5. UFC 200 Failed Drug Test
It was supposed to be the biggest card in history. It seemed like everything was going to go as planned. Then, just 3 days until the fight was supposed to happen, Jon Jones was flagged for a potential doping violation and removed from the card.
Jon Jones got busted using PEDs leading into the main event of the biggest card of all time; that has to make him the biggest scumbag in MMA history.
