This Date in Baseball - Aaron Boone hit a pennant-winning HR in the bottom of the 11th
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2003 American League Championship Series - Wikipedia
Aaron Boone's ALCS winning home run wouldn't be with MLB's potential rule change - Pinstripe Alley
Ten years later, ALCS hero Aaron Boone embracing his Yankees moment – New York Daily News
Aaron Boone remembers his walk-off HR - ESPN - Yankees Blog- ESPN
Aaron Boone walk-off HR 2003 ALCS, On this day in 2003, Aaron Boone hit an 11th-inning walk-off homer to clinch the pennant and send the Yankees to the World Series!
This Date in Baseball - Aaron Boone hit a pennant-winning HR in the bottom of the 11th
Best home runs in MLB postseason history
October 16, 2004: Yankees obliterate Red Sox, 19-8, to take commanding lead in ALCS – Society for American Baseball Research