(Renton, WA)  --  The Seahawks are making moves to shore up their injury-riddled offensive line.  The Hawks have re-signed center Lemuel Jeanpierre, who was Seattle's Number Two center last season.  Jeanpierre was placed on injured reserve earlier this year and was later waived, but is back with the team after starter Max Unger suffered injuries last Sunday that will keep him out for weeks.  The Seahawks have also signed defensive tackle Travian Robertson, and have  released tackle Andrew McDonald and defensive back Steven Terrell.