With the playoff game coming up, I started looking at some of the stats from Arizona this season. Seems like the general consensus is that despite starting a random quarterback off the street, we should be concerned about their defense.
Arizona has the 24th ranked defense this year, and although stats don't mean anything once the playoffs start, consider the teams we have beaten/tied this year in similar ranking.
Also, another thing to note, is that they are one of the most penalized teams in the league on defense. They have had 130 penalties on defense for the year and 1,192 worth of yards coming from those penalties.
I would expect us to try and exploit their overaggressive nature by using the hard count more and tossing up a few deep balls (hopefully not on 3rd and 1).