According to the Brazilian news site Tatame, Thiago Tavares was the mystery fighter that failed his post-fight drug test in Brazil last month at UFC on FX: Belfort vs. Bisping.
Many indicated that it was Vitor Belfort, who scored a TKO victory over Michael Bisping in the main event, that was the guilty party. UFC president Dana White stated recently that Belfort had not failed his drug test.
It has yet to be revealed what Tavares tested positive for, but he will be suspended for nine months. He lost to Khabib Nurmagomedov on the card.