16. Chatri Sityodtong
ONE labels itself as Asia’s biggest sports holding company. They also consider themselves the region’s equivalent of the UFC. Led by Sityodtong, the promotion is active across the continent and boasts millions of potential viewers worldwide. However, this promotion has a dark side. Firstly, Sityodtong has direct links to Evolve MMA in Singapore. Many fighters from this gym receive favorable match-ups and treatment.

Another problem is that other fighters endure punishments if they beat one of his favorites. For example, they may go unbooked for the near future and left stuck in a contract. Furthermore, the promotion has a dubious weight-cutting record and has no known anti-doping policies. If a result doesn’t go Sityodtong’s way, he’ll even call fights a no-contest and create a rematch. He talks a good game but he’s one of MMA’s shadiest promoters.