Castro agreed to one-year contract Tuesday with the KIA Tigers of the Korea Baseball Organization, Dan Kurtz of MyKBO.net reports.
Castro spent all of 2025 in the Royals' farm system and slashed .307/.354/.538 with 21 home runs, 65 RBI and 54 runs scored across 403 plate appearances at Triple-A Omaha. The 32-year-old hasn't appeared in a big-league game since 2023 and will now attempt to continue his career overseas.