Leon Day, pitching for the Newark Eagles, throws an Opening Day no-hitter against the Philadelphia Stars, winning, 2 – 0. It is the last 9-inning no-hitter in the Negro Leagues.

On May 5, 1946 — Leon Day, pitching for the Newark Eagles, throws an Opening Day no-hitter against the Philadelphia Stars, winning, 2 – 0. It is the last 9-inning no-hitter in the Negro Leagues.

Source:
Baseball Reference May 5