The debate has raged for awhile. Can the Cardinals build from within? Is Jeff Luhnow doing a good job? Overall opinion of the Cardinals minor league system has been down for some time. Part of that is because it was standard operating procedure for the Cardinals to usually trade valuable minor leaguers for veteran talent to fill out the major league roster.
While there is no way to quantitatively measure the production of our minor league system, one can look at who was produced, how long it took them to produce, and how old they were when they got to the major leagues.