The Seahawks officially finalized their 53-man roster Saturday by terminating the contracts of defensive tackle Clinton McDonald, fullback Michael Robinson, quarterback Brady Quinn and cornerback Antoine Winfield.

In addition, Seattle waived the following 18 players from the roster: wide receiver Phil Bates, defensive tackle Michael Brooks, defensive tackle Dewayne Cherrington, wide receiver Arceto Clark, tight end Darren Fells, defensive back Winston Guy, wide receiver Chris Harper, tight end Cooper Helfet, defensive tackle Jaye Howard, guard Rishaw Johnson, tight end Sean McGrath, defensive back Ron Parker, linebacker Ty Powell, guard Ryan Seymour, defensive back DeShawn Shead, defensive tackle Sealver Siliga, guard Jared Smith and wide receiver Bryan Walters.