Seahawks extend center Max Unger

AP

The Seattle Seahawks are continuing to work on keeping their offensive line intact.

Center Max Unger has signed a long-term contract extension, a deal that Seahawks G.M. John Schneider said he and coach Pete Carroll targeted as an important step toward building the kind of roster Seattle needs.

“Pete and I are excited to lock up a young core leader on our offense,” Schneider said. “Max’s consistent and professional approach to his job transcends the locker room and the huddle.”

With Unger in place, all five of the Seahawks’ starting offensive linemen are signed for at least two more years: left tackle Russell Okung, left guard Paul McQuistan, right guard John Moffitt and right tackle Breno Giacomini are all also signed through 2013 or beyond.

A 2009 second-round draft pick, Unger started all 16 games at guard as a rookie but then suffered a season-ending injury in Week One of 2010. He bounced back in 2011 to start 15 games at center.