Las Vegas, NV, United States (4E Sports) – UFC light heavyweight Chael Sonnen has been tested positive for two illegal substances in a random drug test.
The Nevada State Athletic Commission (NSAC) randomly tested Sonnen last month while he was in Las Vegas to attend a UFC news conference. Results confirmed the presence of two illegal substances, anastrozole and clomiphene.
With the positive test, Sonnen’s fight against Vitor Belfort at UFC 175 on July 5 will not push through.
“UFC officials acknowledge irregularities in a recent random test,” the UFC said in a statement. “Chael is planning on addressing the matter this afternoon.”
The 37-year-old Sonnen (28-14-1) is expected to discuss the test results on Fox, which he serves as a UFC analyst.
The substances Sonnen tested positive for are classified as antiestrogenic. Anastrozole is used to treat early stages of breast cancer. Clomiphene is used in cases of female infertility.
Sonnen likely will face a suspension in the wake of the test. According to sources, he will not file an appeal.
Earlier, Sonnen stated he was diagnosed with hypogonadism in 2008, resulting in a low level of testosterone. He had been approved the use of testosterone-replacement therapy previously in Nevada.
The NSAC banned TRT in combat sports in February, however, which forced Sonnen to abandon treatment. Shortly after the ban, Sonnen stated he would have to find alternative methods to raise his testosterone or retire.
Sonnen was originally scheduled to fight Wanderlei Silva at UFC 175, which will take place at the MGM Grand Garden Arena in Las Vegas, but Silva was pulled from the card last month when he refused to submit to a random NSAC test.
Belfort (24-10) is facing a licensing issue in Nevada as well. The Brazilian had also been approved the use of TRT in his last three fights but has since discontinued use. He is scheduled to appear at an NSAC licensing hearing on June 17.
This is the second time Sonnen has technically failed a drug test. In August 2010, he tested positive for an elevated testosterone-to-epitestosterone ratio prior to a UFC middleweight title fight against Anderson Silva in Oakland, California. The California State Athletic Commission suspended Sonnen for one year.
Sonnen appealed the suspension in December 2010, during which he revealed his medical condition and admitted use of TRT. The sentence was reduced to six months.
In May 2011, the CSAC suspended Sonnen indefinitely on suspicion of perjury during that December appeal. That suspension officially ended June 29, 2011.