Gleison Tibau became one of the first fighters to fall under the new USADA/UFC testing policy earlier this month, failing his post-fight drug test.
Tibau, who earned a submission win over Abel Trujillo in Brazil, was suspended at the time.
The UFC released a statement regarding the matter on Wednesday:
The U.S. Anti-Doping Agency (USADA) has notified both Gleason Tibau and UFC of a potential Anti-Doping Policy violation stemming from an in-competition sample collected immediately after his bout in Sao Paulo, Brazil on November 7, 2015. Tibau and UFC were previously notified that he had been provisionally suspended due to a potential Anti-Doping Policy violation stemming from an out-of-competition test.
USADA, the independent administrator of the UFC Anti-Doping Policy, will handle the results management and appropriate adjudication of this case involving Tibau. Additional information will be provided at the appropriate time as the process moves forward.