Tim Hightower, the Cardinals 5th round pick, was the first pick to sign yesterday. He agreed to a 3 year deal but financial terms weren't disclosed. Hightower's in a competition with Shipp and Arrington to be Edge's primary backup.
Hightower's already made more news that a normal 5th round pick but he's got a decent chance of being a contributor from day one. His role will likely be limited to spelling Edge and most likely handling short yardage and goal-line carries, if he can manage to win the #2 job.