UFC's Anderson Silva and Nick Diaz both fail drug tests

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Silva and Diaz fought each other in UFC 183, but both also failed drug tests.

Silva's positive result, for the steroid drostanolone, was from a pre-fight, out-of-competition test on Jan. 9. The UFC said in a statement that it was notified on Tuesday by the Nevada State Athletic Commission.

Anderson Silva has been an amazing champion and a true ambassador of the sport of mixed martial arts and the UFC, in Brazil as well as around the world. UFC is disappointed to learn of these initial results. The UFC has a strict, consistent policy against the use of any illegal and/or performance enhancing drugs, stimulants or masking agents by its athletes.

MORE: The good, the bad and the dirty of UFC 183 | Silva hinted at retirement after bout

Diaz tested positive for marijuana after a post-fight test. The UFC responded in a second statement later Tuesday:

As a result of his positive test, Diaz has been informed that he has violated the UFC Fighter Conduct Policy and Promotional Agreement with Zuffa, LLC. The UFC organization will fully respect the Commission’s final decision relating to Diaz at a disciplinary hearing set for February 17.

The UFC said further testing will be conducted to confirm the results.

Silva won the middleweight bout on Jan. 31.

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Jordan Heck is a social media producer at Sporting News