As recently as two years ago, the Cardinals had the best farm system in baseball. Many of their best prospects from those days have since graduated to the big leagues, including Matt Adams, Carlos Martinez, since-traded Shelby Miller, Trevor Rosenthal, the late Oscar Taveras, Michael Wacha and Kolten Wong.
St. Louis' well of Minor League talent doesn't run as deep now, and Stephen Piscotty (No. 90) is the organization's lone representative on MLBPipeline.com's Top 100 Prospect list. The Cardinals are in the process of replenishing their system, though, and there already are encouraging signs.
The first rounds of the last two First-Year Player Drafts yielded left-handers Marco Gonzales (who won two games in the National League Division Series last October) and Rob Kaminsky and righty Jack Flaherty. St. Louis' 2012-13 international signing crop included righty Alex Reyes, outfielder Magneuris Sierra and shortstop Edmundo Sosa. Given the high ceilings of those prospects and the Cardinals' recent development successes, their system should be trending up again in the near future.
Cardinals' 2015 Top 30 Prospects list
Biggest jump: Magneuris Sierra, OF (2014: Unranked | 2015: 6)
Biggest fall: Jordan Swagerty, RHP (2014: 13 | 2015: Unranked)
Players are graded on a 20-80 scouting scale for future tools -- 20-30 is well below average, 40 is below average, 50 is average, 60 is above average and 70-80 is well above average.
Hit: Stephen Piscotty (60)
Power: Randal Grichuk (55)
Run: Charlie Tilson (65)
Arm: Patrick Wisdom (70)
Defense: Juan Herrera (60)
Fastball: Sam Tuivailala (80)
Curveball: Rob Kaminsky (65)
Slider: Andrew Morales (55)
Changeup: Marco Gonzales (70)
Control: Gonzales (65)
How they were built
Breakdown by ETA
Breakdown by position
Jim Callis is a reporter for MLB.com and writes a blog, Callis' Corner. Follow @jimcallisMLB on Twitter. This story was not subject to the approval of Major League Baseball or its clubs.