Possible Reason for Brock Lesnar's UFC 200 Drug Test Failures #MMBUFC

UFC announced that Brock Lesnar failed a second drug test related to his UFC 200 fight win over Mark Hunt, an in-competition drug test. In-competition is considered in the 12-hour window before and after the fight. Lesnar previously failed an out-of-competition drug test from a June 28th sample taken by the US Anti-Doping Agency.

Lesnar failed both tests for the same banned substance and according to LA Times writer Lance Pugmire, Lesnar tested positive for estrogen blocker Clomiphene. This is the same substance Jon Jones previously tested positive for and is common among bodybuilders looking to increase testosterone while cycling off of steroids.

Pugmire tweeted the following:

I'm told by an official with knowledge of Brock Lesnar's positive test that the substance is clomiphene, the same one found in @JonnyBones.

— Lance Pugmire (@latimespugmire) July 19, 2016