14 Legal Medical Marijuana States - Medical Marijuana - ProCon.org Considering that the substance has become legalized in a number of states, how will the NFL's substance abuse policy towards marijuana change, if at all? If say you are a player on the Denver Broncos, and we see that Colorado is one of the fourteen states, and you test positive for marijuana, should there still be sanctions against you? Assuming that you are using the marijuana medically to relieve pain of course. But if you think about it football players are the most likely people to need pain relief. I think it would be hypocritical for the NFL to punish marijuana use IF it is legal in the jurisidiction where the player is taking it and they have the 'doctor's note' that they are using it for medicinal purposes. But looking at the way the Commish has tried to appear 'tough' I don't know what he will do in such a case.