Marijuana is on the World Anti-Doping Agency’s list of prohibited substances. Both USADA and the United States Olympic & Paralympic Committee are signatories to the WADA code, meaning they follow its rules.
The drug is banned only during in-competition periods, which are defined as beginning at 11:59 p.m. on the day before a competition and ending at its conclusion. Athletes may have up to 150 nanograms per milliliter of THC, the main psychoactive substance in marijuana, without causing a positive test.
According to USADA, marijuana is a prohibited substance because it can enhance performance, it poses a health risk to athletes and its use violates the spirit of the sport.
A suspension for testing positive for marijuana can be up to two years. The minimum length is a month, if an athlete can prove the use of marijuana was not related to sports performance and if the person completes a substance abuse treatment program. Just last month USADA suspended Kahmari Montgomery, a sprinter, for one month after he tested positive for marijuana.
Richardson’s positive test came about a week before the United States Olympic & Paralympic Committee needs to submit the names of its athletes competing in Tokyo. And Richardson was not only supposed to be one of them, but also was expected to be one of the most recognizable Olympians, at least by the end of the Games.