Feb 08, 2012 4:21 PM EST

The Padres have built the best farm system in all of baseball, according to ESPN.com's Keith Law.

Law ranked all 30 Major League teams based on solely on the players currently in the organization who have not yet lost their major league rookie eligibility.

"Without Anthony Rizzo, they no longer have a top-25 prospect in their system, but in terms of total future value of players likely to play significant roles in the big leagues, they're ahead of everyone else," Law writes of San Diego.

The Rays, Blue Jays, Cardinals and Royals round out the top five in Law's rankings.

Via Keith Law/ESPN.com