From Pro Football Weekly:

The Cardinals have been a bit coy about the condition of Jerheme Urban, one of a host of receivers in the mix for the team’s No. 3 WR job. Urban was limping around in a walking boot late in May, and some team insiders are wondering whether he might be nursing a stress fracture-type injury. Also on the WR front, we hear that Jamaica Rector, who spent last season on the practice squad, continues to be an intriguing sleeper who has displayed impressive quickness and change-of-direction skills.