Miguel Ángel Castro (born December 24, 1994) is a Dominican professional baseball relief pitcher in the Houston Astros organization.

[4] In 2014, Castro continued his progression through the minor league system, earning promotions to the Vancouver Canadians, Lansing Lugnuts, and Dunedin Blue Jays.

[5][6][7] After Steve Delabar was optioned to minor league camp on March 26, it was reported that Castro would likely make the Opening Day roster as a reliever.

At 20 years, 103 days old, Castro became the youngest pitcher to appear for the Blue Jays, breaking a nearly 38-year-old record held by Víctor Cruz.

Castro was moved back into a regular relief role in the bullpen on April 28, after recording 4 saves in 6 opportunities.

[14] On July 28, 2015, Castro was traded to the Colorado Rockies, along with José Reyes, Jeff Hoffman, and Jesús Tinoco, in exchange for Troy Tulowitzki and LaTroy Hawkins.

[18] In 2019 for the Orioles, Castro appeared in 65 games, allowing a career-high 10 home runs in 73+1⁄3 innings of work, registering a 4.66 ERA.

[19] On August 31, 2020, the Orioles traded Castro to the New York Mets for pitcher Kevin Smith and Victor Gonzalez.

[30] On December 30, 2024, Castro signed a minor league contract with the Houston Astros that included an invitation to spring training.

Castro spent his $43,000 signing bonus on a prostate operation for his father, as well as a surgery to remove his mother's fibrous tumour.