<P> As of July 28, 2013, Diaz was retired from MMA competition . However, in previous interviews, Dana White has since explained that Diaz has money to relax from the GSP fight, but does expect him to return eventually . </P> <P> A possible Middleweight matchup between Michael Bisping and Nick Diaz was briefly linked, but soon turned down by Diaz . At UFC on FOX 9 in Sacramento, Dana White offered Diaz a rematch with Carlos Condit; Diaz turned it down . Diaz attended UFC 170 and had told media that he would return if he could get an immediate title shot . </P> <P> On July 24, 2014, it was announced that Diaz had signed a three - fight contract to return to the UFC . Diaz faced Anderson Silva on January 31, 2015 at UFC 183 . He lost the fight by unanimous decision (46--49, 45--50, and 45--50). A few days after the fight, the UFC revealed that Diaz had once again failed his post-fight drug test for marijuana metabolites, and Silva tested positive on January 9 for drostanolone, androstane, oxazepem, and temazepam in pre-fight drug screening . On August 13, after several reschedules, Silva's disciplinary hearing was held to decide on the subject . Silva's defense argued that a tainted sexual enhancement supplement was the root of the two failed tests for drostanolone and also appealed to mistakes in the NSAC testing procedures, pointing to a pair of drug tests, one on Jan 19 and one after the fight, which Silva passed . He admitted to using both temazepem and oxazepem, benzodiazepines, the night prior to the fight as therapy to control stress and help him sleep . Silva's team was unable to explain the presence of androsterone in the Jan 9 test . The commission rejected the defense and suspended him for one year retroactive to the date of the fight, as the current guidelines were not in effect at the time of the failed tests . Silva was also fined his full win bonus, as well as 30% of his show money, totaling $380,000 . The result was overturned to a no contest . </P> <P> On September 14, 2015 the Nevada State Athletic Commission suspended Diaz for 5 years and fined him $165,000 following his failed drug test at UFC 183 . Following his appeal four months later in January 2016, the suspension and fine were reduced to 18 months and $100,000 . The suspension was officially lifted on August 1, 2016 . Diaz had served a technical suspension due to outstanding fines with the NSAC as stipulated in his settlement claim . For this reason he was unable to corner Nate Diaz during UFC 196 and UFC 202 . Diaz, according to sources, has reached an agreement with the Nevada Athletic Commission, which now frees him to participate in all combat sport - related activities in the state once again . He has not fought since 2015 . </P>

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