According to ESPNs Keith Law 20-year-old Casey Kelly is the top prospect in the Boston Farm System. Here is Kelly’s scouting report.
Note the absence of "SS" from his position -- although Kelly was a good defensive shortstop, he was raw enough at the plate that it didn't make sense for him to continue to hit when he's so polished on the mound and could knock on the big league door in 2010 or 2011 as a pitcher. Kelly's defining attribute as a pitcher is his command, which was unusually good for a high school pitcher (in Sarasota, Fla.) and hasn't regressed at all since he got into pro ball. He has a chance for three average or better pitches, with a solid-average fastball already, a curveball that frequently flashes plus with good depth and tight rotation, and an above-average changeup with good arm speed and some fade. As you might expect from a former middle infielder, Kelly is a great athlete who fields his position well and repeats his delivery, contributing to that above-average command. He probably will add a little velocity as he goes, but his ability to locate his fastball and chance for two above-average to plus secondary pitches make him a top-flight pitching prospect even without the big fastball.
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