QB decision an easy one: Jackson's pectoral injury isn't expected to sideline him for long, but while he's still limited, the team gets another chance to evaluate backup Charlie Whitehurst. Better yet, the Seahawks can do so without demoting Jackson. It's a big upset if Jackson plays Sunday. Seattle also has hopes for third-string quarterback Josh Portis. Keeping Portis active as the No. 2 quarterback could make sense. The Seahawks are not a quarterback-driven team. Might as well check out the backups.
Line continually in flux: The Seahawks have used 14 starting combinations on their offensive line since Pete Carroll became head coach last season. The team has never used the same five more than three times in a row or at all. Lemuel Jeanpierre, who broke into the NFL with Kansas City as an undrafted rookie free agent in 2010, would likely make his first career start if Unger cannot play. That would make 15 starting combinations on the line in 24 regular-season and postseason games under Carroll. The Seahawks under Carroll have rolled with personnel changes, never stressing over them outwardly. Still, replacing the quarterback and center heading into a road game isn't an ideal situation.
Also, tight end Zach Miller will miss this game for Seattle with the neck injury he suffered against the New York Giants. The team could activate Cameron Morrah from the physically unable to perform list. Miller's absence hurts the Seahawks' run game, most likely.