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Final Grade: D
The best opportunity for the Seahawks to win involved stopping San Francisco's ground game. They did that well in the first half but seemed to run out of gas over the final 25 minutes.
Frank Gore became the first runner to have a 100-yard game against Seattle this season.
On Gore's 37-yard run, Bobby Wagner allowed himself to get engaged and Leroy Hill got too close to the line of scrimmage. It didn't allow him to collapse on Gore and left a huge running lane.
Seattle wasn't able to mount a solid pass rush, either.
Alex Smith routinely had ample time in the pocket. Smith can be forced into making penalties when pressured, as seen when he was flushed from the pocket and threw his only interception on the day.
Fourth Quarter: D
The big failure in this game was the inability of the line and linebackers to hold the ground game in check in the second half. Linebackers were getting too close to the line and getting caught up in the wash and linemen couldn't hold their gaps.
The 49er offensive line did a good job, but more is expected of this unit.
Third Quarter: D
And they're back. The front seven didn't maintain gap integrity on run plays and left tight ends and running backs open over the middle and in the flats.
If they can turn things around in the last frame the Seahawks still have a chance to pull out the win.
Second Quarter: A
What a difference a quarter makes. The coaching staff made some adjustments and the Seahawks came out and stuck a three-and-out on San Francisco's first drive of the quarter.
Bruce Irvin made his presence known. Joe Staley was concerned with Irvin's speed and tried to get a head-start before the snap.
The 49ers had three possessions in the quarter and gained just 12 yards and no first downs.
Seattle still isn't get as much pressure on Smith as they need to force him into mistakes, but the secondary isn't allowing him room to throw the ball.
First Quarter: D-
Brandon Mebane was caught inside several times, losing gap integrity. The linebackers failed to fill running lanes inside and on the edges.
K.J. Wright wasn't doing enough to fend off blockers, even with the difficult task of working off Vernon Davis and Delanie Walker.
The most glaring issue was allowing a 15-yard completion on a 3rd-and-10 play. It was a dump pass to the running back and signifies an area where Seattle has to get better.
The team also had issues generating a pass rush.
Jason Jones registered a coverage sack. He excelled in an area Seattle struggled in 2011; he stopped Alex Smith from escaping up the middle following outside pressure.
The biggest thing that was missing in Week 6 was a consistent pass rush.
Seattle will need to turn up the pressure on a 49er team that will be short-handed on the offensive line. The way to stop San Francisco is to shut down the run and not allow Alex Smith time to get comfortable. Hit him early and often and the passing game will wilt.
Add in some pressure from the secondary and all the better.
The 49ers should be at full-strength, as Joe Staley is on the active roster.