Big Days in Astros History - October 6, 1980 - Astros clinch first division title in club history
Houston Astros - Wikipedia
Houston Astros - Wikipedia
October 3, 1999: Astros clinch third consecutive NL Central title in Astrodome's last regular-season game – Society for American Baseball Research
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Big Days in Astros History - October 6, 1980 - Astros clinch first division title in club history
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Big Days in Astros History - October 6, 1980 - Astros clinch first division title in club history
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