Dodgers' Fabio Castillo: Dropped from 40-man roster

Castillo was designated for assignment by the Dodgers on Wednesday, J.P. Hoornstra of the Los Angeles Daily News reports.

The move opens up a spot on the 40-man roster for top pitching prospect Walker Buehler to join the Dodgers. Castillo earned his first trip to the majors this season, but he made just two appearances, allowing a pair of earned runs over 1.1 innings. The 28-year-old spent most of his season with Triple-A Oklahoma City, compiling a 4.27 ERA in 84.1 innings.