Seattle Mariners pulled off the upset to defeat Houston Astros. Seattle Mariners entered the game as the underdog, with a 39% chance to win before the game started.
From the outset, Seattle Mariners refused to go away, chipping away at Houston Astros's lead until Seattle Mariners took their first lead at the end of the game. Houston Astros never recovered after losing the lead, and by the time the game ended, Seattle Mariners had earned the upset.