http://baseballprospectus.com/article.php?articleid=9820

Four-Star Prospects
1. Mike Trout, OF
2. Hank Conger, C 
3. Jordan Walden, RHP 
4. Trevor Reckling, LHP 
5. Fabio Martinez, RHP
Three-Star Prospects
6. Garrett Richards, RHP
7. Peter Bourjos, CF 
8. Randall Grichuk , LF
9. Tyler Skaggs, LHP 
10. Jon Bachanov, RHP
11. Tyler Kehrer, LHP

Four More:
12. Chris Pettit, OF: This hitting machine is limited to a corner athletically, and a lack of power hurts him there.
13. Tyler Chatwood, RHP: An undersized righty, he can miss bats with plus velocity, but his secondary stuff and command need work.
14. Alex Amarista, 2B: The tiny Venezuelan won the Midwest League batting title, but he has questionable upside.
15. Mark Trumbo, 1B: His power dropped off in Double-A; as first-base prospect, he has to mash.

John Sickels' Top 15

 

1) Mike Trout, OF, Grade B+: On overall upside potential, has to rank number one but although I'd love additional performance data about his power development. A bit of a risk, but the upside is outstanding.

2) Hank Conger, C, Grade B+: I think a full breakout is possible in 2010. I like the bat, the glove is coming along, just hope he stays healthy.

3) Trevor Reckling, LHP, Grade B+: Needs to lower his walk rate, but I liked him a lot last year and he performed well as one of the youngest pitchers in Double-A.

4) Garrett Richards, RHP, Grade B: First-class stuff and command was much better in pro ball than in college ball.

5)  Peter Bourjos, OF, Grade B-: Borderline B. Speed goes nicely with improved plate discipline.

6)  Fabio Martinez, RHP, Grade B-: Great stuff with high strikeout rate, needs to lower walks and prove himself at higher levels.

7)  Tyler Skaggs, LHP, Grade B- due to lack of experience, but supremely projectable.

8)  Jordan Walden, RHP, Grade B-: tough to rank and grade due to '09 injury problems. If healthy he's a personal favorite, and dominated at times in the Texas League before getting hurt.

9) Jon Bachanov, RHP, Grade B-: Tommy John survivor drew raves in the Arizona Rookie League, showing sharp command of plus stuff. Just needs more experience.

10) Chris Pettit, OF, Grade B-: I think he can be a solid player but not a star.

11) Randal Grichuk, OF, Grade B-: borderline C+. Very strong power potential, but needs to make a lot of improvements with his plate discipline.

12) Trevor Bell, RHP, Grade C+: Forgotten prospect re-established himself in 2009. Does not have the upside of the other Grade C+s, but he's closer to being able to help. Didn't do great in the majors but deserves more chances.

13) Ryan Chaffee, RHP, Grade C+: High strikeout rate with very high GO/AO ratio. Needs to lower walks, big sleeper for '10.

14) Tyler Chatwood, RHP, Grade C+: Similar to Chaffee, gets strikeouts and grounders although not quite as extreme, also a sleeper if he can throw more strikes.

15) Jean Segura, 2B, Grade C+: Very young, fast, hit well in the Pioneer League, but has problems with injuries.