Each month, the Diamondbacks' Player Development staff chooses a player and a pitcher from a list of nominees sent in by the coaches at each level. For May 2025, the organization's Minor League Player and Pitcher of the Month are outfielder Slade Caldwell and right-hander Dylan Ray.
Caldwell, 18, was the team's top draft choice in the 2024 MLB Draft. For the month of May, he hit .313 with five doubles, a triple, a home run, and a .865 OPS with Class-A Visalia. Among the best hitters in the California League, he ranked in the top 10 for batting average, on-base percentage, walks, and OPS.
Because of his strong start relative to his young age for the level, we moved him up to the top spot in our midseason prospect rankings. Caldwell projects as a starting center fielder in the major leagues. His approach at the plate needs some refinement to maximize the damage he can do with the bat.
Ray, 24, enjoyed the best month of his career. In five starts with Double-A Amarillo, he pitched to a 2.03 ERA with 35 strikeouts and three walks in 31 innings. All five of his starts were quality starts, as he allowed no more than two runs in any start and struck out at least six.
Ray has since been promoted to the organization's Triple-A affiliate in Reno. He's jumped up to the No. 7 spot in our farm system rankings thanks to increased fastball velocity and better refinement of his breaking pitches. He projects as a bottom-of-the-rotation starter that has to rely on mixing a diverse arsenal of pitches to keep batters off balance.
Here are the list of players nominated at each level.
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