The Chiefs picked up offensive tackle Riley Reiff in the first round and they make another depth move by selecting Robinson here. He'll be backing up Brandon Flowers and Stanford Routt in Kansas City.
SB Nation's Chiefs blog, Arrowhead Pride, explains the pick:
The Chiefs lost CB Brandon Carr in free agency but replaced him with CB Stanford Routt. Routt's deal with the Chiefs is essentially a two-year contract (no obligation from the Chiefs on the third year) so they'll need someone to step in and take his place. Enter Josh Robinson. A prospect from a smaller school may need a little more time to develop and he'll have all the time he needs in Kansas City as the Chiefs are set at starting cornerbacks for the 2012 season. In the short term, this is a depth move. In the long term, Robinson ultimately takes over as the starting cornerback opposite Brandon Flowers.