...but the UFC will not say who.
From mmajunkie.com:
http://mmajunkie.com/news/31074/ufc-152-and-ufc-on-fuel-tv-5-drug-tests-come-back-clean-one-trt-exemption.mma
"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."
Vitor 
Vitor or Hamill is my guess.
Vitor.
These poor fighters who never fully developed.
Imagine if they had the test levels of your local mechanic?
Boy howdy would we see a monster.
obviously vitor
SonofJockstrap - Does it really matter? Didn't read enough tabloids this week?
It obviously matters to you. You clicked on this thread and also commented. Is Vitor your favorite fighter? Sorry bro for making you cry.
Clearly Mighty Mouse. He looked huge 
Have to agree with the general consensus that it is Belfort and good for him. The old lion's in physical decline, use what ever tools are legally available to be at your best. Thought he looked great, much better than at 185.
JeffersonDArcyChoke - Vitor.
These poor fighters who never fully developed.
Imagine if they had the test levels of your local mechanic?
Boy howdy would we see a monster.
Never fully develop?
Explain
Dude obviously isn't cheating hard enough. Doesn't he want to be a champion?
He was within the limit. This shouldn't be a big deal.
Lasko -He was within the limit. This shouldn't be a big deal.
Yes it fucking is. TRT tells us who has used steroids a bunch in their career. With that in mind, I'd put money on it being Belfort.
an obvious former steroid abuser in vitor belfort should not be allowed to continue cheating so he can make up for the damage hes done to his body from past cheating.