1. Andrew McCutchen, OF, Grade A-
2. Steven Pearce, OF-1B, Grade B+
3. Neil Walker, 3B, Grade B (not convinced he'll hit quite as well as they expect)
4. Daniel Moskos, LHP, Grade B
5. Brad Lincoln, RHP, Grade C+ (pending recovery from TJ)
6. Brian Bixler, SS, Grade C+
7. Shelby Ford, 2B, Grade C+
8. Duke Welker, RHP, Grade C+
9. Brian Friday, SS, Grade C+
10. Andrew Walker, C, Grade C+
11. Jamie Romak, OF, Grade C
12. Nyjer Morgan, OF, Grade C
13. Brad Corley, OF, Grade C
14. Bryan Bullington, RHP, Grade C
15. Matt Peterson, RHP, Grade C
16. Romulo Sanchez, RHP, Grade C
17. Quincy Latimore, OF, Grade C
18. Marcus Davis, OF, Grade C
19. Tony Watson, LHP, Grade C
20. Josh Sharpless, RHP, Grade C
What a horrible system. There isn't much else to say about it.
John's grading system may not be intuitive for readers, so here's a quick breakdown: A guy's grade is a reflection of both his likely development AND his proximity to the majors. As such, a guy who grades out as a "C" could be either a bench-player-in-training in AAA or a guy in rookie ball with starter-level talent but maybe four years of development (and potential pratfalls) between then and now.
Right now, he's saying that the system includes one future star, three guys who look like potential ML regulars, and a bunch of guys who are either low-ceiling, injured, or playing for a spot on the 2012 roster. The sad part is that I can't disagree with him in any significant respect. Having Ed Creech as a scouting director is a development strategy right up there with sowing your fields with salt. Right now, we're easily bottom 10 among ML franchises, probably bottom 5, and most of the teams behind us are ones that just nuked their farms to make prospect-for-veteran trades over the offseason. We had to sign more than 30 minor-league free agents last year in order to provide enough organizational players to field teams at all levels, and that's probably not going to change for the next few years.
If you're interested in reading about prospects, I recommend Sickels's book. It makes a good companion to BA's book, and I usually buy both. There are a fair number of subtle differences in approach between the two, and as such they complement each other quite well.