Brock Lesnar was issued a temporary suspension on Tuesday after failing two drug tests surrounding his return to the octagon at UFC 200.
According to the Nevada Athletic Commission (NAC), Lesnar tested positive for the banned substances clomiphene and hydroxy-clomiphene. Clomiphene is an anti-estrogen agent that is commonly taken following steroid usage to prevent certain side effects.
Lesnar failed an out-of-competition drug test administered by the USADA on June 28 and an in-competition test taken at UFC 200. The results of both tests did not come back until after he defeated Mark Hunt at UFC 200 in July.
Both Lesnar and Jon Jones, who tested positive for hydroxy-clomiphene and Letrozole metabolite, are facing a maximum one-year suspension from the USADA for their failed drug tests, rather the expected two-year suspension.
According to the World Anti-Doping Agency Code, “there is a greater likelihood that these (specified) substances could be susceptible to a credible non-doping explanation,” meaning the consequences are not as severe.
Lesnar and Jones are also expected to have a formal hearing with the NAC regarding the failed drug tests later this year. The pair could face additional suspensions and fines from the NAC. Depending on the result of the hearing, Lesnar could have his UFC 200 win overturned.