Seahawks blow out 49ers, clinch playoff spot Seattle trounces San Francisco 42-13 for third-straight high-scoring victory updated 11:31 p.m. The Seattle Seahawks clinched a playoff berth with a 42-13 win over the San Francisco 49ers on Sunday Night Football. Seahawks QB Russell Wilson threw four TDs in the victory. The win is the third-straight for Seattle, which is averaging a 40-point margin of victory over that span. Stay with NBCSports.com for updates shortly.