Stephan Bonnar and Dave Herman both failed their drug tests at UFC 153.
UFC 153 took place Oct. 13 at the HSBC Arena in Rio de Janeiro and was headlined by Bonnar’s light heavyweight duel with longtime middleweight champion Anderson Silva. “The Spider” dispatched Bonnar in the first round, dropping “The American Psycho” with a knee to the body and finishing him off with ground-and-pound in 4:40.
Bonnar, who recently announced his retirement from active competition, previously tested positive in 2006 for a Boldenone metabolite after his UFC 62 rematch with Forrest Griffin. The 35-year-old veteran was suspended nine months and fined $5,000 by the Nevada Athletic Commission after that infraction was discovered.
Herman, meanwhile, was submitted by Antonio Rodrigo Nogueira in the evening’s pay-per-view co-headliner, tapping to a “Minotauro” armbar with just 29 seconds remaining in the second frame.
As with Bonnar, this also marks the second time that Herman has been flagged, as he was previously pulled from a UFC 136 matchup with Mike Russow one year ago when he tested positive for marijuana in a pre-fight drug screen administered by the Texas Department of Licensing and Regulation. Herman later denied using the substance.