All fighters who underwent drug testing at the recent UFC 152 and UFC on FUEL TV 5 events passed their drug tests.

Marc Ratner, the UFC's vice president of government and regulatory affairs, today confirmed the results with MMAjunkie.com (www.mmajunkie.com).

Ratner said one fighter received a therapeutic-use exemption for testosterone-replacement therapy at UFC 152, but he wouldn't identify the individual, who tested within allowable limits, he said.

UFC 152 took place Sept. 22 at Toronto's Air Canada Centre, and UFC on FUEL TV 5 took place Sept. 29 at Capital FM Arena in Nottingham, England. With no regulatory body handling the drug testing, the UFC coordinated it under Ratner's direction.

According to Ratner, eight fighters were tested at UFC 152 all competitors were tested at UFC on FUEL TV 5.

All fighters tested negative for drugs of abuse (such as marijuana and cocaine), as well as anabolic steroids and other performance-enhancers.

In UFC 152's pay-per-view headliner, UFC light-heavyweight champion Jon Jones defended his title with a win over Vitor Belfort. At UFC on FUEL TV 5, Stefan Struve knocked out fellow heavyweight contender Stipe Miocic in the FUEL TV-televised main event.




Source: UFC 152 and UFC on FUEL TV 5 drug tests come back clean, one TRT exemption

I wonder who did the TRT therapy ...

Revealing that there was a TRT exemption but not revealing the identity of the fighter is largely detrimental. This then ensues a constant questioning of who it was. If anything Zuffa isn't a public entity so I just wouldn't reveal the information in the first place.
My guess is Vitor Belfort but hey it's just a guessing game at this point, right?