The Seahawks have lost 27-year old starting center Chris Spencer for the next 4-6 weeks due to a torn quadriceps.  He played in 11 games (all starts) for the Seahawks last season.  He has now played in 50 games (40 starts) in his 4 seasons with Seattle.  Second year man Steve Vallos will battle rookie 2nd round pick out of Oregon Max Unger for the right to start at center when the real bullets fly.  Vallos played in 16 games (5 starts) as a rookie last season for the Seahawks so he would appear to have the upper hand.  Losing Spencer on top on OT Walter Jones will spell deep trouble along the O-Line for the Seahawks this season.