1) Youth relative to league (19 years old in A+ and AA) 2) Plus defensive tools at a premium position (SS) 3) Plus speed 4) Contact Ability Yeah, the guy could bust, but even before the AFL he was a Top 40 prospect in all of baseball. Considering there have been rumors going around that the Cubs might make him the everyday SS in 2010 with Theriot moving to 2B, he clearly has really good potential to be a special player. Remember how you said those previous top-level prospects with the Cubs panned out with other teams? I'd rather not see that happen with the Cubs and Castro, especially if the Cubs didn't get appropriate value for him. I don't think Granderson for Castro plus other prospects would be a good deal for the Cubs.