The Seahawks plan to sign nine-year veteran DL Ryan Sims, an unrestricted free agent, according to a league source.
Sims was released by the Buccaneers in November after started only one game for the team in 2010 before suffering a knee injury.
The Chiefs selected Sims in the first round of the 2002 draft out of North Carolina. He later joined the Bucs via trade in 2007 and started 16 games for them in 2009.
Sims has 143 combined tackles, 8.5 sacks and an interception over his career.