April 11
On April 11, 1966, Emmett Ashford became the first black umpire in Major League Baseball.
Sources
Jordan, A. (2022, April 11). Honoring Major League Baseball’s first black umpire ahead of Jackie Robinson Day. Black Enterprise. Retrieved April 1, 2023, from https://www.blackenterprise.com/baseballs-first-black-umpire-emmett-ashford-broke-major-leagues-color-barriers/
TheBlack.Blog 