The NFL has suspended Dallas Cowboys defensive end Randy Gregory without pay for a minimum of one year for violating the Policy and Program for Substances of Abuse.
His suspension is effective immediately, meaning he will not play in any postseason games this season for the Cowboys.
Gregory was suspended the first four games of the 2016 season for a violation during his rookie season and subsequently suspended another 10 games for missing a test in the offseason.
The most recent violation, which is believed to be for missing another test, occurred during the regular season while he was with the team but not practicing.