The Raiders signed veteran LB Omar Gaither and placed LB Travis Goethel on injured reserve with a knee injury.
Gaither has played in 77 games with 40 starts in six seasons with the Eagles and Panthers. Last season, he played in 10 games with four starts for Carolina. He had 31 tackles, one sack and one pass defensed.
Gaither spent the previous five seasons with the Eagles. He started every game in 2007 and recorded 102 tackles and eight passes defensed.
Goethel appeared in eight games this season and had two tackles.