A huge, daunting figure who can touch 99mph with his heater, White Sox righthander Simon Castro is one of the most promising pitchers in a system that's not especially deep in pitching to begin with. Castro's slider is probably his best pitch, and when he's locating the fastball at the same time, he's nearly unhittable. Some scouts see a closer in Castro, but for now the Sox will follow the path the Padres started, and keep pushing him as a rotation member. One thing is sure: he's got the frame necessary to carry 200 innings, so they're probably wise to squeeze him into the rotation if possible.