The Seattle Seahawks' secondary is set to face another obstacle.

NFL Media columnist Michael Silver reported Monday that Seahawks cornerback Brandon Browner is facing a suspension for violating the league's substance abuse policy, according to sources with knowledge of the situation. The suspension is for one year, NFL Media's Albert Breer reported, per union sources. The Seahawks are ready to move on without Browner, per Silver.

Silver previously reported that Browner was facing a suspension for performance-enhancing drugs, rather than substance abuse. We apologize for the error.

NFL Media Insider Ian Rapoport reported Sunday that Seahawks cornerback Walter Thurmond is facing a four-game suspension for violating the league's substance abuse policy. Thurmond is expected to drop an appeal of his suspension next week in order to return for the playoffs.

Browner also missed the final four games of last season for violating the league's performance-enhancing drug policy. He's currently recovering from a groin injury and was not expected to be available until mid-December, coach Pete Carroll said last week.

Silver reported that the Seahawks are trying to sign veteran Antoine Winfield to help replace Browner and Thurmond. He also reports that free-agent cornerback Perrish Cox is expected to visit Seattle for a tryout Tuesday. Rapoport reports that former Seahawk Marcus Trufant worked out for the team Monday.