Astros vs. Mariners: What is the longest MLB postseason game?

On Saturday, the Astros and the Mariners set a record for the longest postseason game in MLB history.
SEATTLE — The Houston Astros and Seattle Mariners banged their way into the record books on Saturday, setting the longest postseason game in MLB history. They played 18 innings in Game 3 of the American League Division Series, with the Astros winning 1-0 on a home run by Jeremy Peña at the top of the frame.
According to MLB.com, the longest a postseason game had before was 18 innings. And now it’s been done four times, twice in games the Houston Astros attended.
First there was the Astros-Mariners game on Saturday, which went 18 innings.
In 2005, Houston defeated Atlanta 7-6 in Game 4 of the National League Division Series. In that game, Chris Burke sent Astros fans happily home with a walk-off winner at Minute Maid Park.
These games are longest tied with the Dodgers and Red Sox in Game 3 of the 2018 World Series. Los Angeles won this 3-2. Also, Game 2 of the National League Division Series in 2014 went 18 games as it took the Giants 18 innings to win the Nationals 2-1.
The Astros were also involved in a 16-inning game in the 1986 National League Championship Series. That was a 7-6 loss to the Mets. That was the longest postseason game in nearly 20 years before the 2005 game surpassed it.
Saturday’s Astros-Mariners game is also the longest MLB postseason game in history to go scoreless, eclipsing a game earlier this postseason between the Guardians and Rays. That game was scoreless until the 15th inning when the Guardians won it 1-0, according to the Bleacher Report.
https://www.king5.com/article/sports/mlb/astros-mariners-alds-game-3/285-2fb48de5-e3ea-4ba7-9f48-7b417458c64a Astros vs. Mariners: What is the longest MLB postseason game?