NFC West teams lead the NFL in shutting down quarterbacks. They also lead the league in yards per rushing attempt allowed on called running plays.
By called running plays, I'm excluding quarterback scrambles. However, even if we included those plays, NFC West teams would have the lowest yards per carry allowed through Week 5.
Adrian Peterson (3.4 per attempt vs. the NFC West), Cedric Benson (2.4), DeMarco Murray (3.7) and C.J. Spiller (3.4) have fallen well short of a 4.0-yard average against the division. LeSean McCoy (5.4), Alfred Morris (5.6) and Marshawn Lynch (5.0) are the only backs averaging at least 4.0 per attempt against the NFC West among the 15 players with at least 10 carries.
Seattle, San Francisco and Arizona are allowing 3.5 yards per carry or less. St. Louis is allowing 4.2 per attempt.
The chart from ESPN Stats & Information provides some context.