The Seahawks have agreed to a six-year deal with the last unsigned rookie first-rounder, Russell Okung, that is worth more than $29 million guaranteed and a maximum value of $58 million.
Okung, a 6-foot-5, 307-pound offensive tackle, was the sixth overall pick in the 2010 NFL Draft after being a two-time, First-Team All-American at Oklahoma State.
In 2009, Okung won the Jim Parker Trophy, which is given yearly to the top collegiate offensive lineman, and was named Big 12 Offensive Lineman of the Year.
Seattle selected Okung in April's draft to replace retired All-Pro left tackle Walter Jones.
New Seahawks coach Pete Carroll named him the starter the day he drafted Okung.
Okung missed the first six days of Seattle's training camp.
The Associated Press contributed to this report.