"I can pass a drug test in eight days with herbal cleansers," Diaz said in an interview with the LA Times. "I drink 10 pounds of water and sweat out 10 pounds of water every day. I'll be fine."
Diaz says his marijuana usage helps him with his attention deficit disorder.
However, marijuana has also stripped Diaz of the biggest win over his career, a gogoplata submission over Takanori Gomi at PRIDE 33 in February 2007. Diaz tested positive for marijuana and had his win overturned to a "no contest." Further, the Cesar Gracie fighter was suspended for six months and fined.
Diaz was also pulled from an EliteXC fight in March 2008, according to the California State Athletic Commission, for not turning in a prescription for medical marijuana in time for the fight.