For this week’s MLB Pipeline Podcast, Jonathan Mayo made a stop in Altoona, Pa., to check in on two of the best infield prospects in the game. He started with the Phillies’ Aidan Miller, who has made some serious adjustments to his approach to finish his season with Double-A Reading red-hot. Then he moved over to the home clubhouse to chat with No. 1 overall prospect Konnor Griffin of the Pirates, who just got promoted to that level. Before those conversations, Sam Dykstra and Jonathan break down the top farm systems based on three groupings: infielders, outfielders and pitchers. And the duo comes back after the interviews to answer a Mailbag question about Royals pitching prospects.

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