Two more in, two more out

Coach Pete Carroll said on Monday that the Seahawks would do something to help their injury-depleted lines.

The moves came Tuesday, when offensive tackle Will Robinson and defensive tackle Amon Gordon were signed – or re-signed, actually. Robinson was with the team in training camp last year, but released on the final roster cut. Gordon was in the same situation this summer.

To clear roster spots, guard Allen Barbre and rookie defensive end E.J. Wilson were released. Wilson was a fourth-round draft choice, but had been inactive of eight of the first 10 games. Barbre was signed in late September. He had been active for three games, but played only on special teams.

The offensive line was in need of a tackle, because Tyler Polumbus might have to play guard in Sunday’s game against the Kansas City Chiefs at Qwest Field if left guard Chester Pitts (sprained ankle) and backup Mike Gibson (sprained ankle) are not ready. Polumbus has started six games this season because of injuries to first-round draft choice Russell Okung, who is now back at left tackle.

Robinson (6-5, 300) also was with the Seahawks during training camp in 2008, but was placed on injured reserve. He was signed off the Washington Redskins’ practice squad.

“We’ll get research here to do a couple things to get things straightened out,” Carroll said on Monday.

Gordon (6-2, 305) had been with the Tennessee Titans, but was released two weeks ago. The coaches liked what they saw from him during the preseason games, but there just wasn’t room for him on the 53-man roster.

That has changed because of injuries to end Red Bryant and nose tackle Colin Cole. Bryant was lost for the season with a damaged knee tendon in the Week 8 loss to the Raiders in Oakland. Cole sprained an ankle in the same game. He has missed the past three games and Carroll said he could miss a couple more. They have been replaced in the starting lineup by Kentwan Balmer and Junior Siavii, each a lighter player who is in his first season with the team.

The loss of the run-stuffing presence supplied by Bryant and Cole has coincided with the Seahawks’ problems stopping the run. After allowing an average of 70.4 rushing yards in their first five games – three of them wins; the Seahawks have allowed 140.4 in their past five games – three of them losses.

“I’m really concerned about what’s going on up front on defense,” Carroll said. “We’re fighting it out right now.”