I know he's only in Boise and he's barely got over 100ABs, but I couldn't be more excited about what Hak-Ju Lee could become. Lightning fast and great defensive tools. If he can cut down on his K's while maintaining his patience he might take over Castro's spot as most exciting SS prospect. At this point I think Lee has to be the Cub's fifth best prospect behind Vitters, Jackson, Castro and Cashner.