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 NFL.com.

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.