Posted by ESPN.com's Mike Sando
The Cardinals have fallen from 10th to 19th in yards allowed per game over the last two weeks.
That included a five-spot drop this week, leaving the 49ers with the highest-ranked defense in the NFC West after Week 16.
The Seahawks rose four spots in points per game allowed after holding the Jets to a field goal.
Where NFC West defenses finished in yards allowed last season: Seattle 15, Arizona 17, St. Louis 21 and San Francisco 25.