Tito Ortiz
Former UFC light-heavyweight champion Tito Ortiz was one of the scariest fighters in the world during his prime years, but he rapidly deteriorated in both skill level and likeability in the latter stages of his career.
Well publicized beefs with his pornstar wife Jenna Jameson, constant complaints about injuries, WWE type antics in Bellator and preventing Cris Cyborg Justino from fighting Ronda Rousey all helped make Tito a prime d-bag.
His highlights:
