On April 21, 1900 — At Schorling’s Park on Chicago’s south side, the White Sox, as a minor league team, play their first game in franchise history, losing to Milwaukee, 5-4. The small wooden ballpark located at 39th and Princeton, also known as Southside Park, will continue to be the Windy City home for the team when they join the American League next season.

Source:
National Pastime

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