Here is a list of Cub prospects ranked according to stolen bases per game, also showing games, steals, caught stealing and success rate. I include only regular-season games played at Boise or above, no higher than Iowa.
I would isolate two important groups here, those with SB/game ratios higher than .30–I’ll call them rabbits–and those below that number but above .20. The latter I will call speedsters. There are three rabbits in the organization, Campana, Valdez and Lee. These players are unstoppable. At least, they can’t be discouraged. If they get on base, they are going to run.
The speedsters are Fuld, Adduci, Jackson, Guyer and Castro. I would compare these to Ryan Theriot. They like to run, but can probably be discouraged, and would prefer to pick their spots.
Campana, Valdez, Fuld, Adduci, Jackson and Guyer are centerfielders. The prototype Tim Wilken outfield draftee is a centerfielder who can run. (Fuld was drafted before Wilken’s time. Adduci was traded for in 2006, on Wilken’s watch. One supposes that Wilken, the “director of amateur and professional scouting,” is involved in the selection of undrafted Caribbean players like Valdez–and Castro.)
It is important to note that the current Cubs have one speedster starting, Theriot, and one on the bench, Fuld. They have no rabbits. So this group of running prospects should have the Cubs’ attention.