The Dodgers have designated righty Fabio Castillo for assignment, J.P. Hoornstra of the Southern California News Group tweets. A 40-man roster spot was needed for the team’s activation of top pitching prospect Walker Buehler.
Castillo, 28, earned his first trip to the majors this year, though he made only two appearances over the weekend. He has spent most of the season pitching in the upper minors, working to a 4.04 ERA with 8.7 K/9 and 3.4 BB/9 over 91 1/3 innings split between Double-A and Triple-A.