Former UFC middleweight champion Anderson Silva, widely considered the greatest mixed martial artist of all time, has been suspended one year by the Nevada State Athletic Commission because of multiple failed drug tests.

Silva, 40, appeared before the NSAC for a disciplinary hearing Tuesday; he had failed several tests before and after his Jan. 31 fight against Nick Diaz at UFC 183.

The one-year suspension is dated retroactively to Jan. 31. He also was fined $380,000 and must submit a clean test before he can be re-licensed. The result of the fight, a unanimous decision victory for Silva, changes to a no-contest.

The Brazilian fighter tested positive for drostanolone, an anabolic steroid, in addition to a form of androstane, on Jan. 9. He tested positive for drostanolone again on Jan. 31, as well as anti-anxiety medication, which also is considered a banned substance.