Detroit Tigers Castro signed with the
Detroit Tigers as an international free agent in July 2011 and would spend all of 2012 and 2013 with the
VSL Tigers. In 2014, he played for the
GCL Tigers and would go on to post a 6–3 record and 4.10 ERA over thirteen games, with twelve starts. He would, however, miss all of 2015 as a result of
Tommy John surgery and against spent 2016 with the GCL Tigers, finally making his full-season Tigers organization debut in 2017 with the
West Michigan Whitecaps. That season he posted a 10–6 record with a 2.49 ERA as a starter, only allowing opponents to hit .226 off of him. He impressed in 2018 with the
Lakeland Flying Tigers with a 9–4 record, 2.93 ERA, and a career-high 101 strikeouts. He earned a brief two-week call-up that season to the AA
Erie SeaWolves where he started three games and returned to Lakeland having posted an 8.10 ERA, but only allowing a .229 average off of him. In 2019, Castro would spend the season with Erie and start pitching out of the bullpen. After four appearances, however, he would return to a role as a starter. He gained notoriety within the Tigers' organization as he held opponent to a career-low .207 average against and would earn a spot in the top-twenty Tigers prospects for the mid-season update of the MLB.com organizational listing. Castro was re-signed after becoming a minor league free agent on November 7, 2019. Castro was added to the Tigers 40–man roster following the 2019 season. Castro made his major league debut on July 27, 2020, but gave up a two-run homer in one inning of work.
Toronto Blue Jays On December 7, 2020, Castro was claimed off waivers by the
Toronto Blue Jays. On January 21, 2021, Castro was designated for assignment by the Blue Jays following the signing of
Tyler Chatwood. Castro was outrighted on January 27. On April 14, 2021, Castro was selected to the active roster.
Cleveland Guardians On April 7, 2022, the Blue Jays traded Castro to the
Cleveland Guardians in exchange for
Bradley Zimmer. Castro was designated for assignment on September 1, 2022.
Baltimore Orioles On September 3, 2022, Castro was claimed off waivers by the
Baltimore Orioles. He made 8 appearances for the Triple-A
Norfolk Tides down the stretch, registering a 2.16 ERA with 8 strikeouts in innings pitched. He did not appear in a game for Baltimore, and was
designated for assignment on October 6, after
Anthony Bemboom was added to the roster. He cleared waivers and was sent outright to Norfolk on October 10, but rejected the assignment in favor of free agency on October 13.
Washington Nationals On December 14, 2022, Castro signed a minor league deal with the
Washington Nationals. He appeared in only two games for the Triple–A
Rochester Red Wings, allowing five runs on three hits and three walks in of an inning. On July 25, 2023, Castro was released by the Nationals organization.
Piratas de Campeche On April 11, 2024, Castro signed with the
Piratas de Campeche of the
Mexican League. In 14 relief outings for the Piratas, he struggled to an 8.76 ERA with 20 strikeouts and 3 saves across innings pitched. Castro was released by Campeche on May 15. ==References==