Anderson Silva is facing a possible anti-doping violation and has been pulled from the UFC Fight Night 122 headliner against Kelvin Gastelum.
The UFC announced Silva’s positive test and removal on Friday. The former middleweight champion’s failed test comes from an out-of-competition sample collected on Oct. 26. As a result, “The Spider” has been provisionally suspended by USADA. A replacement opponent for Gastelum is currently being sought by the Las Vegas-based promotion.
Silva is entitled to a full legal review process before any sanctions are imposed. The 42-year-old Brazilan previously tested positive for two different anabolic steroids -- drostanolone metabolites and androstane -- prior to a January 2015 bout against Nick Diaz at UFC 183. He also tested positive for oxazepam, an anxiety medication, and temazepam, an anti-insomnia medication, in a post-fight drug test, along with drostanolone metabolites again. Silva claimed that a tainted sexual enhancement pill resulted in the positive test, but he was still suspended one year by the Nevada Athletic Commission.
Silva returned to action in 2016, losing decisions to Michael Bisping and Daniel Cormier. He returned to the win column at UFC 208 on Feb. 11, taking a controversial three-round verdict over Derek Brunson.
UFC Fight Night 122 takes place at Mercedez-Benz Arena in Shanghai, China, on Nov. 25. The card is expected to stream in its entirety on UFC Fight Pass.