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The 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."

The 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."

The 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."

The 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."

The 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."

The 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."