MMAJunkie has the scoop from Nevada State Athletic Commission Executive Director Keith Kizer, noting all 13 fighters tested were clean:
The NSAC tested both of the night's headliners (Court McGee and Kris McCray), as well as Matt Hamill, Keith Jardine, Chris Leben, Aaron Simpson, Dennis Siver, Rich Attonito, John Gunderson, Brad Tavares, Kyle Noke, Chris Camozzi, Travis Browne.
All tested negative for drugs of abuse (such as marijuana and cocaine), as well as anabolic steroids and other performance-enhancers.
The NSAC traditionally tests both main-event fighters, all winning fighters and any competitors who previously failed drug tests. However, some of the testing remains random, and all fighters are subject to it.