Seahawks finish off fading 49ers

The 49ers’ playoff hopes were extinguished by their bitter rivals. Fending off a spirited first-half challenge, the Seahawks pushed to a 17-7 victory over the visiting Niners on Sunday. The win officially knocks San Francisco out of playoff contention for the first time in Jim Harbaugh’s four seasons as coach. And with speculation about Harbaugh’s…