According to B.A.-And 19 year old phenom Rick Porcello leads the way:
1. Rick Porcello, rhp, Lakeland (Tigers)
2. J.P. Arencibia, c, Dunedin (Blue Jays)
3. Logan Morrison, 1b, Jupiter (Marlins)
4. Jeremy Jeffress, rhp, Brevard County (Brewers)
5. Adrian Cardenas, 2b, Clearwater (Phillies)
6. Jeremy Hellickson, rhp, Vero Beach (Rays)
7. Sean West, lhp, Jupiter (Marlins)
8. Wilson Ramos, c, Fort Myers (Twins)
9. Scott Cousins, of, Jupiter (Marlins)
10. Michael Taylor, of, Clearwater (Phillies)
11. Todd Frazier, ss/3b, Sarasota (Reds)
12. Drew Stubbs, of, Sarasota (Reds)
13. Chris Valaika, ss, Sarasota (Reds)
14. Jose Ceda, rhp, Daytona (Cubs)
15. Juan Francisco, 3b, Sarasota (Reds)
16. Taylor Green, 3b, Brevard County (Brewers)
17. Cale Iorg, ss, Lakeland (Tigers)
18. Francisco Samuel, rhp, Palm Beach (Cardinals)
19. Jonathan Lucroy, c, Brevard County (Brewers)
20. Zach McAllister, rhp, Tampa (Yankees)
Can't help but point out (I'm a homer, remember?) that #20 Zach McAllister had an identical 8-6 record, but an ERA 3/4 of a run lower (1.83 to Porcello's 2.66) and boasted a .225 BAA as opposed ot Porcello's .244 number.
I'm chalking it up to the fact that McAllister was promoted up from Low A at the beginning of the season, and didn't have a full season's worth of innings in Hi A.
On another note, look at all those Sarasota Reds. One of the stronger systems in baseball appears that it will stay that way.