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Watch: Chael Sonnen Claims Jon Jones Tested Positive For Two Forms Of Oestrogen Blocker

We still don’t know the names of the banned substances found in samples that Jon Jones’ provided to USADA agents on June 16th, but two MMA personalities have now made separate yet identical claims regarding the nature of those substances.

On Monday, during an appearance on The Joe Rogan Experience, former UFC middleweight and light-heavyweight title contender Chael Sonnen stated that Jones had popped for two forms of oestrogen blocker.

“Boom! It’s out there,” said Sonnen casually, after haphazardly tossing his information grenade on proceedings.

This was consistent with an assertion made by former UFC light-heavyweight champion Rashad Evans during an on-site report for CBS(via MMAJunkie). Evans, who, like Sonnen, is a former opponent of Jones, claimed that he had received this information from a source within the Jones camp.

According to Iain Kidd, who wrote a wonderfully informative piece on oestrogen blockers for Bloody Elbow, there is some evidence to suggest that a number of these substances can cause an increase in testosterone production. However, it’s their common usage in conjunction with steroids and during “post-cycle therapy” to offset negative side-effects that is most worrying.

Jones was flagged by USADA only days in advance of UFC 200. As a result he was withdrawn from his scheduled bout with bitter rival Daniel Cormier and was subsequently replaced by Anderson Silva.

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Author: The PA Team

This article was written by a member of The PA Team.