ESPN's Adam Schefter reported Sunday that Seahawks cornerbacks Richard Sherman and Brandon Browner are facing four-game suspensions under the NFL's policy on performance-enhancing drugs.
According to the report, Sherman and Browner are appealing the suspensions, insisting they are innocent. An appeal could be heard as early as this week.
USA Today reports the substance is Adderall, an amphetamine that helps players focus, and is not banned by the NFL if a player files his prescription with the league.
Richard Sherman tweeted Sunday: "This is issue will be resolved soon and the truth will come out. Not worried."
With only five games left in the regular season, this would be a huge blow to the Seahawks playoff run. Sherman leads the team with four interceptions and three forced fumbles. Browner has three interceptions and two forced fumbles.
Rookie safety Winston Guy was suspended four games last Monday.