Castillo (4-10) earned the win over St. Louis on Saturday, allowing one run on five hits and three walks while striking out nine across seven innings.
Castillo fell behind by a run in the second inning, but that ended up being the only score the Cardinals could muster against the right-hander in the contest. Castillo registered an impressive 23 swings-and-misses in the outing and finished with his highest strikeout total since May 18. He has allowed one or zero runs in six of his past eight outings, bringing his ERA down from 6.47 to 4.20 over that stretch. His next start is expected to take place in Chicago against the Cubs on Thursday.