According to multiple reports, Brock Lesnar failed a second drug test.
Lesnar, who was flagged for a violation of the USADA anti-doping policy from a June 28 out-of-competition test, also failed a July 9 fight-night drug test. Both times, according to reports, clomiphene was found in his results.
The former UFC heavyweight champion returned from an extended layoff and defeated Mark Hunt via decision in the co-main event.
Clomiphene is the same drug that Jon Jones tested positive for during a test that led to his dismissal from UFC 200. The drug is often used in tandem with performance-enhancers and is also believed to help re-start natural testosterone production. It is banned year-round by the USADA.