Editor’s Note: Attribution for the Gera Alvarez quote has been added to this story since it was first published.
Righthander Mitch Keller entered phase two of his development as an elite prospect.
The 21-year-old began his ascent last season, when he made a mechanical change to his delivery. Keller held his glove firmly above his belt, which enabled him to better locate his fastball to both sides of the plate.
He recorded a 2.35 ERA in 24 starts, mostly at low Class A West Virginia, while striking out 9.5 and walking 1.3 batters per nine innings. He ascended to the No. 1 prospect ranking in the system.