At #38 the Cardinals need to be prepared for the unexpected. That's a spot in the draft where typically there are a couple of players still on the board who were projected to go in the top 35 picks.
One player that probably won't be there who would be, imo, a tremendous pick at #38 is Kansas St. LB Arthur Brown. Of course, now, with D-Wash out for the first 4 games, adding Brown would be outstanding---plus, Brown is very versatile, and is a 3 down LB wherever you put him.
If not, the kid out of Iowa St., Jake Knott, is an ideal player to take for WILB...and Knott, coming off of a labrum injury, probably could be had in the 5th round---but he's a good one, both in run support and pass coverage.