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Watch NowThe story of John Donaldson, a star pitcher in the Negro Leagues and "the greatest baseball player you've never heard of."
The story of John Donaldson, a star pitcher in the Negro Leagues and "the greatest baseball player you've never heard of."
![[sic]](https://image.tmdb.org/t/p/w500//9QinhViyMi7yJ6ob5laHXVekpES.jpg)
