Chicago Cubs pulled off the upset to defeat San Diego Padres. Chicago Cubs entered the game as the underdog, with a 43% chance to win before the game started.
From the outset, Chicago Cubs refused to go away, chipping away at San Diego Padres's lead until Chicago Cubs took their first lead during the middle stretches of the game. San Diego Padres never recovered after losing the lead, and by the time the game ended, Chicago Cubs had earned the upset.