According to Eric D. Williams of the The Bellingham Herald, six players on the Seattle Seahawks have tested positive for performance enhancing drugs since 2011. The latest one is defensive end Bruce Irvin, who tested positive for Adderall.
Other Seahawks players that have failed performance enhancing drug tests are Brandon Browner, Winston Guy, John Moffitt, Allen Barbre and Richard Sherman. Yet Sherman appealed his suspension and it ended up being overturned. I personally believe Sherman wasn’t clean. He’s fortunate that someone supposedly slipped when they handled his sample. Players around the NFL have spoken out anonymously and have made it clear that the majority of players are taking Adderall.
This is a widespread issue around the NFL, but the Seahawks have their own issues to work out within their organization.