Lutui, who played for Seahawks coach Pete Carroll at USC and who spent all six of his NFL seasons with the Cardinals, became a reserve in 2011, with 15 appearances and no starts. He had been a full-time starter for four full seasons.
Ruud arrives after playing one season in Tennessee, which followed six with the Buccaneers. A groin injury limited him to nine games (all starts) in 2011.
Lewis re-signs with the Seahawks after four NFL seasons. He spent his rookie year of 2008 with the Steelers and the last three in Seattle. Lewis has one career start.