SAN JOSE, Calif. – For the second consecutive week, linebacker Luke Kuechly will have to settle for providing moral support rather than run support.

Kuechly is among four Panthers who weren't able to practice all week and have been ruled out for Sunday's game at the Seahawks. Kuechly, who went in the concussion protocol after Carolina's victory over New Orleans in Week 11, made the 10-day West Coast trip knowing he'd miss the first game in Oakland but holding out hope for the Seattle game.

Still, his presence has paid dividends.

"He's done a really nice job of talking to the guys and being in communication with them," head coach Ron Rivera said. "It's a neat thing."

Defensive end Mario Addison didn't make the West Coast trip after suffering a foot injury against the Saints. Safety Kurt Coleman (concussion) and right tackle Daryl Williams (ankle) were injured against the Raiders and are out.

Rivera said Tre Boston and Michael Griffin, who had been sharing snaps alongside Coleman, would man the safety spots in his absence, with safety Colin Jones serving as the primary backup for both and cornerback Robert McClain ready in case of emergency.

With Williams out and centers Ryan Kalil and Gino Gradkowski now on injured reserve, Rivera said the Panthers will go with the same offensive line that finished out the Raiders game: tackle Mike Remmers and guard Andrew Norwell still on the left side, Tyler Larsen at center, Chris Scott at right guard and usual right guard Trai Turner at right tackle.

"They've done well with it," Rivera said. "Trai Turner has handled it real nicely. It's a real plus to have a guy like that."