The Nevada State Athletic Commission (NSAC) recently revealed the post-fight drug test results for 12 of the 20 competitors that fought at "The Ultimate Fighter" Season 9 Finale, which took place on June 2o at The Pearl at the Palms Casino Resort in Las Vegas, NV.

All drug tests came back clean and included the following fighters: Diego Sanchez, Clay Guida, DaMarques Johnson, James Wilks, Ross Pearson, Andre Winner, Chris Lytle, Joe Stevenson, Brad Blackburn, Nick Osipczak, Melvin Guillard and Tomasz Drwal.

The tests searched for anabolic steroids and other performance-enhancers, as well as recreational drugs like cocaine and marijuana.

Athletic commissions usually randomly select individuals for the tests, but typically test the main event fighters and fight night winners, as well as those who have failed tests in the past.

In the main event, Diego Sanchez defeated Clay Guida via split decision in a exciting back and forth battle. In other main card action, Brits Ross Pearson and James Wilkes won The Ulimate Fighter season 9 lightweight and welterweight tournaments respectively, and Joe Stevenson bested Nate Diaz in a exciting display of grappling.