Cards' defense in danger of wearing down

Posted by ESPN.com's Mike Sando

GLENDALE, Ariz. -- Expect the Cardinals to become increasingly vulnerable on defense if their offense fails to sustain longer drives.

The Arizona defense has been on the field 20 of the first 28 minutes of this wild-card game at University of Phoenix Stadium. This is a function of the Cardinals scoring quickly, the Falcons sustaining drives more effectively and Arizona suffering a turnover.