1 of 3
John Froschauer, Associated Press
San Francisco 49ers quarterback Colin Kaepernick (7) is sacked in the second half of an NFL football game by Seattle Seahawks outside linebacker Bruce Irvin (51) and Kam Chancellor, left, Sunday, Dec. 14, 2014, in Seattle.

SEATTLE — Marshawn Lynch rushed for 91 yards and a touchdown, Russell Wilson threw a touchdown pass to rookie Paul Richardson, and the Seattle Seahawks knocked archrival San Francisco from playoff contention 17-7 Sunday.

The defending Super Bowl champions remained in contention for a division title and No. 1 seed in the NFC.

After a sluggish, sloppy first half, Seattle (10-4) awoke in the final 30 minutes behind the running of Lynch and a defense that shut out the 49ers, holding them to 67 yards. Colin Kaepernick was sacked six times and the 49ers didn't run a play past the Seattle 38 in the second half.

Lynch scored on a 4-yard run late in the third quarter and the Seahawks took advantage of a short field on their next drive, capped by Wilson's strike to Richardson.

The loss and Detroit's win eliminated San Francisco (7-7) from contention.

AP NFL website: www.pro32.ap.org and http://twitter.com/AP_NFL