Renton, WA (SportsNetwork.com) - The Seattle Seahawks placed safety Jeron Johnson on injured reserve and signed cornerback Perrish Cox.
Cox played nine games for the 49ers earlier this season. He signed with Seattle on Nov. 26 only to be released the following day.
In 40 career games with Denver and San Francisco, Cox has 80 tackles and an interception.
Seattle also signed linebacker Mike Taylor to the practice squad.