u/Crazy_Baseball3864

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The MLB record was 11 (Yankees vs Tigers, 7/26/1928)

They have also single handedly set the NL record for most runs scored by both teams in the 12th inning.

edit: with the Nationals scoring 1 run, they have tied the MLB record for most runs scored by both teams in the 12th inning. Hilariously, both times it happened before was by the Yankees vs the Tigers. On 05-14-1923 and 07-26-1928

Of them, the 1969 Mets are the only one to win the World Series

The other teams:

2025 Brewers - July 6-21 (11 games); Aug. 1-16 (14 games)

2019 Astros - April 5-16 (10 games); May 8-18 (10 games)

2017 Dodgers - June 16-25 (10 games); July 4-19 (11 games)

2015 Blue Jays - June 2-14 (11 games); Aug. 2-13 (11 games)

2013 Braves - April 5-16 (10 games); July 26-Aug. 9 (14 games)

2001 Cardinals - May 7-17 (10 games); Aug. 9-19 (11 games)

1978 Pirates - Aug. 16-24 (10 games); Aug. 27-Sept. 6 (11 games)

1977 Royals - Aug. 17-26 (10 games); Aug. 31-Sept. 15 (16 games)

1969 Mets - May 28-June 10 (11 games); Sept. 6-13 (10 games)

1969 Astros - May 17-28 (10 games); June 18-27 (10 games)