Chicago, IL – Marshawn Lynch rushed for 42 yards and two 14.
Lynch carried the ball 20 times and became Seattle's first 1,000-yard rusher since Shaun Alexander in 2005.
Tarvaris Jackson completed 19-of-31 passes for 227 yards and a touchdown for the Seahawks (7-7), who have won three in a row.
Caleb Hanie connected on 10-of-23 passes for 111 yards, a touchdown and three interceptions for the Bears (7-7), who have dropped four straight.
Kahlil Bell carried the ball 15 times for 65 yards. He also caught five passes for 43 yards and a score for Chicago, which was outscored 31-0 in the second half.
Chicago wide receiver Johnny Knox was taken off the field on a stretcher in the first quarter. He suffered a back injury after taking a hard hit.