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September 4, 1916: Pitching legends Mordecai Brown, Christy Mathewson duel for the final time – Society for American Baseball Research
Publicity photograph of Christy Mathewson and Rida Johnson Young during the stage production The Girl and the Pennant - NYPL Digital Collections
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July 5, 1912: 'Magician-like' Christy Mathewson sours Brooklyn's grins while earning 300th career win – Society for American Baseball Research
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