(Renton, WA)  --  The Seahawks are preparing for Sunday's home opener against the 49ers.  Cornerback Richard Sherman sat out his second straight Seahawks' practice with a hamstring injury.  He has never missed a game since entering the league in 2011.  Seattle lost its opener 17-9 at Green Bay.  Russell Wilson passed for only 158 yards and no touchdowns against the Packers.  The 49ers made only 13 first downs in losing their home opener 23-3 to Carolina.