If you are interested (and I know some of you are). On the first night of the NFL Draft a large number of rookies were dropped into Madden NFL 12 which provided insight into what their ratings will be for Madden NFL 13. They are featured in Ultimate Team mode and any rookies that are obtained will later carry over to start with in Madden 13. Since then additional players have been added.
(#10) Stephon Gilmore: 73 overall
(#41) Cordy Glenn: 79 overall
Gilmore had the lowest overall rating in the top 20, and Glenn had the highest rating after Decastro (84) at 24.