Prospect rankings are completely useless. This is not to say that they are bad, because they aren’t. They do frequently whiff, of course, because predicting individual baseball success is really, really hard. (Recent top overall prospects have included mediocrities like Andrew Benintendi, Jurickson Profar, and Delmon Young, while Baseball Prospectus’s top farm system of 2012 belonged to the San Diego Padres, who proceeded to finish each of the next 10 seasons under .500.) But generally speaking, the very top prospects turn into good-to-great ballplayers, and the top farm systems subsequently lead to Major League success.