Ultimate Fighting Championship

Nick Diaz tested double the legal limit for marijuana

Published Feb. 4, 2015 6:53 p.m. ET

Damon Martin

Nick Diaz failed his post-fight drug test administered after his bout against Anderson Silva in the main event of UFC 183 and it turns out the former welterweight title contender had double the legal limit of marijuana metabolites in his system.

The test results were provided Wednesday to FOX Sports by the Nevada State Athletic Commission.

According to the test conducted by Quest Diagnostic Labs, the sample from Diaz was collected at 10:38 p.m. on Jan. 31, which would have been within an hour of the end of his fight against Silva.

The test was then sent to the lab and received on Feb. 2, when the results showed Diaz was positive for marijuana metabolites. The results showed Diaz at 300ng/mL, which is double the legal limit for marijuana in Nevada.

The state of Nevada followed rules changes set forth by the World Anti-Doping Agency and upped the legal limit for marijuana from 50ng/mL to 150ng/mL in 2013.

This is the third time Diaz has tested positive for marijuana in his career. He was suspended six months for the initial infraction in 2007 and then suspended for one year on his second positive test in 2012.

Diaz lost the fight to Silva by unanimous decision, but the former middleweight champion also tested positive from a pre-fight test that showed two separate performance-enhancing drugs. Silva denied using drugs in a statement released on Wednesday.

Diaz will have his first preliminary hearing with the Nevada State Athletic Commission on Feb. 17, when they will likely hand him a temporary suspension pending a full disciplinary hearing at a later date. The future hearing could also decide if the fight between Silva and Diaz will stand or be overturned and declared a no-contest.

The test results provided to FOX Sports show Diaz was clean for all other drugs of abuse. The results for performance-enhancing drugs have not been returned yet.