Pittsburgh Pirates pulled off the upset to defeat Houston Astros. Pittsburgh Pirates entered the game as the underdog, with a 39% chance to win before the game started.
From the outset, Pittsburgh Pirates refused to go away, chipping away at Houston Astros's lead until Pittsburgh Pirates took their first lead during the middle stretches of the game. Houston Astros did not go quietly, recapturing the lead for themselves, until Pittsburgh Pirates regained control for good at the end of the game.