Dillashaw was on top of the world before it came falling around him. He won plaudits for his science-based approach to fight preparation but soon became a villain. That’s because the former bantamweight champion failed a drug test after a defeat to Henry Cejudo in 2019 (via MMA Junkie).
EPO is a PED that enhances endurance. Dillashaw was unlucky because testers often don’t check for this substance but they detected it this time. USADA suspended him for two years after he violated their drug policy. The seedy superstar returned as one of the UFC’s villains-in-chief.