The D-Backs are bringing back lefty reliever José Castillo on a minor league deal, reports Daniel Álvarez-Montes of El Extrabase (X link). Castillo, a client of OL Baseball Group, will get a non-roster invite to MLB camp.
Castillo sticks in the organization for a second season. He spent last year with the Snakes’ top affiliate in Reno. He missed the first half of the year to injury and was limited to 21 appearances. He tossed 20 2/3 innings of 4.35 ERA ball in a very tough park for pitchers. Castillo fanned a decent 24.4% of opponents against an 8.1% walk rate. His fastball averaged 94.3 MPH, a tick below the level he showed with the Padres in 2023.
That generally solid performance wasn’t enough to get a big league look with the Snakes a year ago. Still, Castillo sufficiently impressed the front office to get another non-roster invite. While he didn’t reach the majors last year, he pitched in parts of four seasons with San Diego. The Venezuelan-born southpaw has a 4.24 ERA in 40 1/3 big league innings.
A.J. Puk, Joe Mantiply and Kyle Nelson are the three lefty relievers on Arizona’s 40-man roster. Tommy Henry and Blake Walston could work in long relief or as rotation depth. Puk will pitch in high leverage spots, while the soft-tossing Mantiply has been a steady contributor in the middle innings. Nelson missed almost all of last season after undergoing surgery to treat thoracic outlet syndrome, so he could find himself on the roster bubble in Spring Training. Andrew Saalfrank will be an option midway through the season. He’ll remain on the restricted list into June after being issued a one-year suspension for betting on MLB games while he was in the low minors.