Seattle Seahawks defensive end Bruce Irvin will miss the first four games of the 2013 National Football League season after being suspended on Friday for an NFL substance abuse policy violation.
Irvin made 16 tackles, half of them quarterback sacks, in 16 games for the Seahawks last year in his first NFL campaign.
The ban was for a performance-enhancing susbtance violation. The league does not announce details of the substance involved under medical privacy provisions of the collective bargaining agreement with players.
While Irvin can take part in pre-season workouts and games, he will miss regular-season games against Carolina, San Francisco, Jacksonville and Houston and the paychecks he would have received for those games.
Irvin will be able to return to the team September 30 and he would be eligible for his first game of the season on October 6 at Indianapolis.