Using yellow dyed balls, the Cardinals beat the Dodgers 5-2 at Sportsman’s Park. The experimenting with the use of the colored sphere, which is designed to make the ball easier to see for the players and the fans, started in Brooklyn last week and will be tested once more, in a September game played at Wrigley Field.

This Day In Baseball

On July 23, 1939 — Using yellow dyed balls, the Cardinals beat the Dodgers 5-2 at Sportsman’s Park. The experimenting with the use of the colored sphere, which is designed to make the ball easier to see for the players and the fans, started in Brooklyn last week and will be tested once more, in a September game played at Wrigley Field.

Sources:
National Pastime January 28

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