Seattle Seahawks starting cornerbacks Richard Sherman and Brandon Browner are facing four-game suspensions for violating the NFL's policy against performance-enhancing substances, according to a report on

Sherman and Browner, who are expected to appeal the suspensions, are accused of testing positive for Adderall, which is on the list of substances banned by the league.

A number of players have already been suspended for testing positive for Adderall this year, including New England Patriots cornerback Aqib Talib while he was a member of Tampa Bay, and current Buccaneers cornerback Eric Wright.

Sherman leads the Seahawks with four interceptions this season, while Browner, a Pro Bowler last season, has three.