The Seahawks placed DE Dexter Davis on injured reserve Saturday and signed CB Kennard Cox.
Davis, a seventh-round pick in 2010, played in 15 games last season and made 13 tackles and one sack. He played in Seattle's season opener against the 49ers but did not record a tackle.
Cox played in 11 games for the Seahawks last season, making most of his contributions on special teams. He did have 10 tackles and two passes defensed.