Mixed martial arts promoter Ultimate Fighting Championship and the United States Anti-Doping Agency announced on Thursday that marijuana would no longer be banned for fighters in most cases. UFC and USADA officials said that they have made significant changes “in the handling of cannabis and its naturally occurring cannabinoid compounds.”
Under the new policy, positive tests for carboxy-THC, a metabolite of the cannabinoid, would no longer be a violation “unless additional evidence exists that an athlete used it intentionally for performance-enhancing purposes.”