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Brock Lesnar tested positive for anti-estrogen; Lesnar, Jon Jones won’t face UFC fine

Brock Lesnar and Jon Jones share something more in common than just their former billing as UFC 200 headliners.

The banned substance Lesnar tested positive for in in-competition and out-of-competition drug tests in relation to his UFC 200 fight with Mark Hunt was hydroxy-clomiphene, a source with knowledge of the test result confirmed with MMA Fighting on Friday. ESPN and the LA Times were the first to report the news earlier this week.

Jones also tested positive for clomiphene, an anti-estrogen agent, as well as Letrozole, an aromatase inhibitor, before what would have been a main event fight with Daniel Cormier at UFC 200.