October 9
From The Met Wiki
1999: The Mets defeat the Arizona Diamondbacks, 4-3, to clinch the National League Division Series. Todd Pratt's home run in the bottom of the tenth inning wins it.
1999: The Mets defeat the Arizona Diamondbacks, 4-3, to clinch the National League Division Series. Todd Pratt's home run in the bottom of the tenth inning wins it.