In addition to potentially failing an out-of-competition drug test, Gleison Tibau is also facing a potential Anti-Doping violation for a sample submitted in-competition.
The UFC released a statement on Wednesday announcing that the U.S. Anti-Doping Agency notified both Tibau and the Las Vegas-based promotion of a potential violation stemming from a test taken immediately after his bout at UFC Fight Night "Belfort vs. Henderson 3" in Sao Paulo on Nov. 7.
Tibau was already provisionally suspended by USADA for his out-of-competition test. The substance for which the lightweight fighter tested positive was not named, but as with the out-of-competition test, USADA is expected to provide further information as the process is completed.
Tibau submitted Abel Trujillo with a rear-naked choke 1:45 into the first round of their bout at UFC Fight Night. The American Top Team product has 26 Octagon appearances to his credit.