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Castillo (0-4) was tagged with the loss Saturday against the White Sox, allowing four runs on five hits across four frames. He struck out six.

This loss against Chicago ballooned Castillo's woeful ERA to 6.57 across 38.1 innings in eight outings this year. He's lost his past three starts and has given up at least four runs in each of those games. Castillo has been confirmed to start next Thursday against the Astros, but according to Ryan Divish of The Seattle Times, the Mariners' plan after that is to piggyback him with Bryce Miller in the rematch series against the White Sox between May 18 and May 20.

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