A refresher course on the NFL's drug policy

Tommy Gilligan-USA TODAY SportsThe Ravens released Will Hill today only hours before it was announced that he was getting a 10 game suspension for violating the NFL's substance abuse policy. With AFC North players like Martavis Bryant and Will Hill landing suspensions from the almighty commish, now seems as good a time as any to take a look at the NFL's substance abuse policy and see just how hard a player has to go to actually get caught.

The substance abuse policy dictates that most players need to get tested once a year. A player also gets tested when signing on with a new team and draft-eligible get tested at the NFL Combine. The standard league test occurs on April 20th, because the…