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| 1887 |
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April 30 -- The Pittsburgh Alleghenies play their first National League game, defeating the defending league champion Chicago White Stockings, 6-2, in front of nearly 10,000 fans at Recreation Park. |
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| 1891 |
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December -- The Alleghenies are renamed Pirates after signing second baseman Louis Bierbauer away from the Philadelphia Athletics. |
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| 1891 |
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April 22 -- The Pirates play their first game at Exposition Park, located on the north shore of the Allegheny River across from downtown Pittsburgh, not far from the current site of PNC Park. |
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| 1900 |
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Barney Dreyfuss, owner of the defunct Louisville club, acquires controlling interest of the Pirates and brings 14 players with him, including future Hall of Famers Honus Wagner and Fred Clarke. |
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