Jon Jones.

Two UFC veterans claim Jon Jones tested positive for Estrogen blockers

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Jon Jones stunned the fight world when it was announced that he had been pulled from the main event of UFC 200 after failing a drugs test.

Dana White announced the USADA violation and Jones himself was incredibly emotional at a press conference after the revelation. Since then, Jones 'B Sample' has also been tested and come back positive, meaning the fighter could be set for a long suspension. 

However, it still hasn't been made clear exactly what Jones took to pop the test. Until now that is, after two UFC veterans both claimed recently that they knew what Jones had failed for.


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The former UFC superstars, Chael Sonnen and Rashad Evans, are both claiming that was taking estrogen blockers in the lead up to the fight, which triggered the positive test.

“Jon Jones is out of UFC 200. He failed a drug test back in June… and it was due to estrogen blockers, I’m told by his camp,” Evans said while reporting for CBS Sports at UFC 200 itself.

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Sonnen mentioned the estrogen blockers during a recent episode of his 'Beyond the Fight' podcast, when talking about Jones and the situation.

“Jon, who is popped for two banned substances, which are estrogen blockers...'”

Apparently, estrogen blockers are sometimes used by men to help those who have used testosterone supplements in restoring hormone balance. Essentially, Jones would've been trying to boost his testosterone levels.

Jones and his camp have yet to confirm or deny the estrogen blocker claims, instead saying that Jones isn't a cheater and has never knowingly taken something on the banned list.

“It’s not that we’re trying to hide anything or that we’re not trying to get ahead of it and tell people what it is,” Jones's manager Malki Kawa said during an interview with the MMA Hour.

“I’m going to stand by our comments at the press conference. Jon, at no point in time, was a cheater, has never cheated, has never taken any substance that he knowingly knew of that was on the banned list.”

Interim UFC Light Heavyweight Champion Jon Jones Press Conference

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Dana White
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Jon Jones

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