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Report: Brock Lesnar tested positive for same banned substance as Jon Jones

Mark J. Rebilas / US PRESSWIRE

Brock Lesnar's in-competition drug-test failure from UFC 200 is allegedly due to the presence of clomiphene, one of the banned substances that Jon Jones also tested positive for according to Lance Pugmire of the LA Times.

Clomiphene is an estrogen blocker that is notable for its application in balancing testosterone levels during and after a cycle of steroid use.

The news of Lesnar's fight-night doping violation broke on Tuesday. It comes on the heels of both he and Jones being busted by USADA for out-of-competition samples, with Jones being removed from UFC 200 when the infraction was revealed three days before the event on July 9.

Lesnar's out-of-competition test results were not available until July 15.

The former heavyweight champion would go on to compete at UFC 200, where he defeated Mark Hunt. However, Lesnar now potentially faces a fine, a suspension, and the overturning of his win depending on the result of his appeal.

For Jones, the particulars of his violation were revealed at a meeting of the Nevada State Athletic Commission on Monday. Jones tested positive for clomiphene and letrozole, the latter also a substance designed to repress estrogen production.

Later that day, Jones tweeted that he and Lesnar "are not in the same boat" with regards to their respective violations, though it's unclear if he was aware of the circumstances of Lesnar's drug tests.

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