During the postseason, Morse was used exclusively as a pinch-hitter and designated hitter. On October 16, in Game 5 of the 2014 National League Championship Series against the St. Louis Cardinals, he came into the game as a pinch-hitter with the Giants trailing 3–2 in the bottom of the eighth inning and hit a game-tying solo home run off Pat Neshek. The Giants would go on to win the pennant in the bottom of the ninth on Travis Ishikawa's three-run home run, sending Morse to the World Series for the first time in his career.