Seattle Seahawks cornerback Brandon Browner is doubtful for Sunday night's highly-anticipated divisional tilt against the San Francisco 49ers. The Seattle secondary is one of the strongest units in the NFL and a key cog of what is one of the league's top defenses. Browner did not play Week 1 because of the injury. Fourth-year corner Walter Thurmond will fill in for Browner, if he's unable to go. How much will Browner's absence affect the Seahawks defense against the passing game?