Gastelum was expected to face former
UFC Middleweight Champion Anderson Silva at
UFC 212 on June 3. However, on April 6, he was pulled from the bout after he was flagged for a potential doping violation by
USADA stemming from his bout against Belfort at this event. He tested positive for Carboxy-Tetrahydrocannabinol (Carboxy-THC) which is a metabolite of
marijuana and/or
hashish above the 180 ng/mL allowance by the
World Anti-Doping Agency (WADA) standard. The in-competition sample was collected on the night of this event. Gastelum was placed on a provisional suspension as a result of the positive drug test and he was expected to be afforded a full adjudication process. On May 7, Gastelum's win was officially overturned and he was suspended 90 days (retroactive to the March 11 test date), and he's been fined 20 percent of his purse (which wasn't disclosed). The fine will be held by the commission. ==See also==