With Baseball America's 2009 Prospect Handbook shipping soon, the top prospects entering this season are soon to become common knowledge. However that doesn't mean I can't try to guess some of the Top 10 beforehand.

What the book may not list is the top prospects broken down by league. That is what especially caught my attention with the following two lists gleaned a Wednesday ESPN.com chat with John Manuel and Ask BA with Jim Callis. Each is NL-Only.

John Manuel's Top 10 National League minor league prospects:

1. SP Tommy Hanson, Atlanta Braves
2. OF Jason Heyward, Atlanta Braves
3. SP Madison Bumgartner, San Francisco Giants
4. OF Cameron Maybin, Florida Marlins
5. 3B Pedro Alvarez, Pittsburgh Pirates
6. OF Mike Stanton, Florida Marlins
7. OF Dexter Fowler, Colorado Rockies
8. OF Colby Rasmus, St. Louis Cardinals
9. C Buster Posey, San Francisco Giants
10. SS Alcides Escobar, Milwaukee Brewers

Jim Callis's Top 10 National League minor league prospects:

1. 3B Pedro Alvarez, Pittsburgh Pirates
2. SP Madison Bumgartner, San Francisco Giants
3. OF Colby Rasmus, St. Louis Cardinals
4. C Buster Posey, San Francisco Giants
5. SP Tommy Hanson, Atlanta Braves
6. 1B Logan Morrison, Florida Marlins
7. OF Jason Heyward, Atlanta Braves
8. OF Dexter Fowler, Colorado Rockies
9. OF Cameron Maybin, Florida Marlins
10. OF Mike Stanton, Florida Marlins