This was from before the Bauer/Myers/D'Arnaud trades. After those trades the Rays and DBacks certainly switch spots while I might have been too high on the Royals (w/ Myers) based on previous strength and the Jays gutted their system. I can understand why the Red Sox are rated high but I'm not as high on the Marlins still but Fernandez and yelich is enough to carry them to the 3rd ranking.
Here are Callis's rankings from the latest Ask BA
Quote:
1. Cardinals
Loaded big league club awaits Oscar Taveras, Shelby Miller and Trevor Rosenthal.
2. Mariners
Their best prospects, even 2012 first-rounder Mike Zunino, have had Double-A success.
3. Marlins
Blockbuster trade with Blue Jays propelled this system from middle of the pack.
4. Rangers
No organization has more high-ceiling prospects, or one better than Jurickson Profar.
5. Red Sox
Help is on the way with Xander Bogaerts, Jackie Bradley, Matt Barnes and Allen Webster.
6. Rays
Dealing for Wil Myers and Jake Odorizzi helps to make up for recent lackluster drafts.
7. Twins
The best collection of bats in the minors, led by Byron Buxton and Miguel Sano.
8. Pirates
System isn't deep but has impressive trios of arms and bats that most can't match.
9. Diamondbacks
No. 6 on my list before subtracting Trevor Bauer and adding Didi Gregorius.
10. Astros
Rebuilding will take time, but trades and 2012 draft are steps in the right direction.

