Top 6 Worst Drug Test Failures in UFC History

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Top 6 Worst Drug Test Failures in UFC History
Kevork Djansezian/Getty Images

With yesterday's news that Alistair Overeem failed a random NSAC drug test, the main event of UFC 146 is in serious question. Overeem was the clear top contender after his huge win over Brock Lesnar at UFC 141 in Las Vegas to close out 2011 and was set to become a top star in the UFC.

However, Overeem isn't the first fighter to fail a drug test nor will he be the last. He belongs to a pantheon of elite fighters who tried to beat the system and use banned substances when preparing for fights.Two (dis)honorable mentions who didn't make the list are Tim Sylvia and Cris "Cyborg" Santos.  

Take a look at the six worst drug test failures in UFC history. 

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