Castellanos passed through waivers unclaimed and will presumably stick around with Arizona as emergency pitching depth after being designated for assignment last weekend. The 26-year-old righty made seven relief appearances for the Diamondbacks in his first stint back in the big leagues since 2022.

Castellanos is off the 40-man roster, and it’s necessitated by the Diamondbacks activating Merrill Kelly off the 60-day injured list. Castellanos will now be on waivers, and if he goes unclaimed he’ll likely report back to Triple-A Reno.

Castellanos was sent down last night before the game was rained out. He’ll likely join Triple-A Reno after today’s festivities.

With Bryce Jarvis (elbow) landing on the injured list on Friday, Castellanos will get another opportunity to pitch out of the Diamondbacks’ bullpen. The 26-year-old hurler has struggled to a 5.23 ERA, 1.45 WHIP and a 7/4 K/BB ratio over 10 1/3 innings in seven appearances at the big-league level this season. Expect him to be utilized in middle relief.