Those rankings do not mean that much, esp. for the kids that are unranked. There are 15 year olds there who just do not look like much at 15, but at 17 and 18 blossom. It is hard to evaluate High School graduates for the draft. Imagine evaluating HS freshmen and sophomores, because that's the age comparable. Thus the bias most prospect evaluators stateside towards players who were drafted and against young IFAs. Eg. In 2009 The Twins drafted Gibson, Bashore, Bullock (never mind), Tootle with their first 4 picks and signed Sano, Polanco, Kepler. Here were the Twins 2010 top prospects according to BA (Manuel) : 1. Kyle Gibson, rhp 2. Aaron Hicks, of 3. Miguel Sano, 3b/ss 4. Joe Benson, of 5. Ben Revere, of 6. Liam Hendriks, rhp 7. Alex Wimmers, rhp 8. Adrian Salcedo, rhp 9. Oswaldo Arcia, of 10. Carlos Gutierrez, rhp Which included all the past 1st Round picks who did not make it in the majors (Hicks, Revere, Wimmers, Gutierrez) and only a handful of IFAs (6-8) and Sano, who should had been number 1, of course.