Scout.com has confirmed that the Cardinals have contacted Wyoming safety John Wendling. They intend to draft him in the next two rounds. Conveniently enough, they have a pick in the fifth that would qualify under that scenario.
Unfortunately, the Denver Broncos have also been in contact with Wendling and intend to take him in that timeframe as well.
Arizona might have to sacrifice more picks in this year's draft (or, more likely next year's draft) in order to acquire him before Denver has a shot at him. This would involve trading into the fourth round. The Cardinals could possibly send their fifth round selection and a second day pick in next year's draft to Minnesota (who, ironically enough has Denver's pick) and take Wendling.
Denver does not draft until the sixth round (no picks in the fourth or fifth round), so they would need to likewise mortgage their future in order to make a move for him. Many pieces need to be moved and placed before anything of consequence happens.
It's entirely possible (and the most likely scenario) that Arizona could simply stand pat and take Wendling when their selection comes up in the fifth round.