Pittsburgh Pirates pulled off the upset to defeat Chicago Cubs. Pittsburgh Pirates entered the game as the underdog, with a 41% chance to win before the game started.
From the outset, Pittsburgh Pirates refused to go away, chipping away at Chicago Cubs's lead until Pittsburgh Pirates took their first lead during the middle stretches of the game. Chicago Cubs did not go quietly, recapturing the lead for themselves, until Pittsburgh Pirates regained control for good at the very end of the game.