Just a month and a half after Chael Sonnen tested positive for performance enhancing drugs following his middleweight title fight against Anderson Silva, the UFC has more dirty urine on its hands. MMA Junkie broke the news yesterday that Octagon first-timer Vinicius Quieroz — who was submitted by Rob Broughton in his debut at UFC 120 in London — tested positive for the anabolic steroid Stanozolol after the match and has been fired by the UFC.

As they usually do for overseas events, the UFC conducted its own drug screening at #120, testing main event fighters Michael Bisping and Yoshihiro Akiyama, as well as six other fighters selected at random. Quieroz was the only fighter who tested positive. In addition to his release from the promotion, the 5-2 Chute Boxe product will forfeit an undisclosed discretionary bonus from the UFC; his test results will also be given to the Nevada State Athletic Commission, which could affect Quieroz’s ability to get licensed to fight in the U.S.


As the newly-updated MMA Steroid Bust Timeline tells us, Stanozolol has been the PED of choice for fighters such as Tim Sylvia, Kimo Leopoldo, Phil Baroni, Ken Shamrock, and Chris Leben — who was also nabbed by the UFC’s independent testing at a U.K. event two years ago.

According to MMA fighters who have seen it first-hand, anywhere from 50% of competitors to everybody except Nate Diaz turn to drugs for athletic advantages — and having another steroid bust in the UFC so soon after the last one only underscores that it’s a serious problem. It also proves that not all steroid busts are created equal in the UFC. If you’re a prospect without a fan-base who loses his first fight in the prelims, you’re clearly expendable. (Later, Vinicius.) But if you’re a title contender who knows how to promote a fight, well…"what else do you do to a human being?"