The NFL Players Association issued a reminder to all players regarding drug policy collection protocol rules.

The reminder closely follows Denver Broncos star linebacker Von Miller being suspended for six games for his violation of the NFL substance-abuse policy.

Here's the reminder sent to all players: “Men: In our efforts to improve the integrity of our collectively bargained joint drug policies, please remember that collection protocol rules, including validation of a player’s identification at the time of collection, will be strictly enforced.”

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Aaron Wilson covers the Ravens for The Baltimore Sun.