The Seahawks have added defensive end Raheem Brock, defensive tackle Junior Siavii and running back Michael Robinson.
The clear roster spots, safety Jordan Babineaux, fullback Owen Schmitt and defensive tackle Kevin Vickerson have been released.
Brock (6-4, 274) played the past eight seasons with the Indianapolis Colts, producing 6½ sacks in back-to-back seasons (2004-05). He was a starter from 2003-08. But the Colts opted to not re-sign him during the offseason and he joined the Tennessee Titans this summer.
Siavii (6-5, 315) was with the Dallas Cowboys last season. The former University of Oregon player was a second-round draft choice by the Kansas City Chiefs in 2004, but he played only two seasons before having microfracture knee surgery and sitting out from 2006-08. He goes by Junior because his full name is Saousoalii Poe Siavii, Jr.
Robinson (6-1, 223) played the past four seasons for the San Francisco 49ers, rushing for 289 yards and catching 43 passes. A fourth-round draft choice in 2006, he also led the 49ers with 27 special teams tackles in 2007.
Babineaux was the Seahawks’ starting free safety last season, when he made a career-best 105 tackles to finish second on the team. But he lost the starting job when Earl Thomas was selected in the first round of April’s NFL draft. Babineaux was moved to strong safety, but lost that job when veteran Lawyer Milloy was re-signed in late April.
Schmitt was a fifth-round draft choice in 2008, but never developed into the lead blocker or special teams player the club anticipated. He started two games and made 12 coverage tackles in two seasons.
Vickerson was acquired in a draft day trade with the Titans, but made only three tackles during the preseason.