 Complete the following phrase:  The longest postseason game by innings in MLB history is 18 innings, which has happened three times. The first 18-inning contest was played between the Atlanta Braves and the Houston Astros on October 9, 2005. In Game 4 of a National League Division Series in Houston, the Braves who were trailing the series 21 and facing elimination took a 61 lead into the 8th inning. A grand slam by Lance Berkman in the bottom of the 8th brought the score to 65, and with two outs in the bottom of the 9th, Brad Ausmus homered to tie the game and send it to extra innings. The score remained deadlocked at 66 until the 18th, when the Astros Chris Burke who entered the game in the 9th inning as a pinch runner hit a walk-off home run to left to win it, sending Houston to the 