Both Baseball America and MLB Pipeline have released their lists of the top prospects in the Arizona Fall League this year and they both agreed that Mitch Keller was the best pitching prospect in the league.

Pipeline posted their list of the top 25 prospects and had Keller ranked fourth overall behind Ronald Acuna, Victor Robles and Francisco Mejia. Their brief write-up on Keller mentions that he had the best fastball package in the league, while flashing a plus curveball and an effective changeup. Earlier this week, Keller was voted on to the All-AFL team.

JT Brubaker got some recognition from MLB Pipeline as one of ten AFL prospects who stood out. He was praised for his high-90s fastball velocity and his effective slider in the article, but not mentioned is that his changeup has be...

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