Here are the results of the Pittsburgh Pirates games played in September and October 1999, as listed in the provided text:
September 1999:
- September 1: Pirates vs. San Francisco Giants - Pirates win 5-4
- September 2: Pirates vs. Arizona Diamondbacks - Pirates lose 3-7
- September 3: Pirates vs. Colorado Rockies - Pirates win 8-6
- September 4: Pirates vs. San Diego Padres - Pirates lose 4-5
- September 5: Pirates vs. Cincinnati Reds - Pirates win 7-3
- September 6: Pirates vs. Houston Astros - Pirates win 9-8
- September 7: Pirates vs. Chicago Cubs - Pirates lose 2-3
- September 8: Pirates vs. Milwaukee Brewers - Pirates win 5-4
- September 9: Pirates vs. San Francisco Giants - Pirates lose 1-5
- September 10: Pirates vs. Arizona Diamondbacks - Pirates win 7-3
October 1999:
- October 1: Pirates vs. New York Mets - Pirates lose 2-7
Note that there are only 8 games listed for September and October 1999, as the text does not provide results for any other games played by the Pittsburgh Pirates during those months. Updated: December 14, 2025 at 6:32 PM