Cesar Gracie has coached Nick Diaz for a long time. He was in Diaz' corner in 2007 when Diaz choked out Japanese star Takanori Gomi at Pride 33 in Las Vegas. He was by Diaz' side when that victory, then by far the biggest in Diaz' career, was overturned by the Nevada State Athletic Commission due to a positive test result for marijuana metabolites in Diaz' urine.
Gracie is still standing by his fighter after a second drug test failure following Diaz' decision loss to Carlos Condit at UFC 143. That loss cost Diaz the UFC interim welterweight title and the drug test results cost him a shot at an immediate rematch.
Gracie was on the MMA Hour and expressed surprise that Diaz failed the test although he knew Diaz had been using marijuana:
"I was very disappointed," Gracie said. "Everyone knows he smokes marijuana medicinally in California. He has a legal right to do it in this state."
"He was surprised he tested positive," Gracie said. "He does the same ritual every fight for the last five years. He stops it in time and he cleanses his system, works out like crazy, drinks a lot of water and purges his system of it."
Gracie said that Diaz has retained Las Vegas attorney Ross Goodman for Diaz' appeal before the Nevada State Athletic Commission.
Gracie also addressed the possibility that Diaz will be true to his word and retire from MMA:
"It's quite possible, actually," Gracie said. "I really believe he loves fighting. I think he's fought too much and I think with all the politics that come with this sport and everything, the negativity, it's a crazy thing and I don't think he likes that part of it and the media and everything. He wanted to test himself as a martial artist and that was the most important thing, even more important than financial gain.
"I think after a certain amount of time he'll get the love back," Gracie said. "So I do want him to go through this process and try to clear everything and get him back on track fighting."