24 or 26. houston astros

10

22 in minors

26

In a 26-inning marathon played on May 1, 1920, Konetchy played first base for the Brooklyn Dodgers against the Boston Braves. The game ended in a 1-1 tie when it was called because of darkness.

24 innings mets v astros. astros won 1-0.

25, six and a half hours

If you are going by innings, it would be a game between Brooklyn and Boston in 1920 when they played 26 innings to a 1-1 tie before being called (the longest one that was played to a decision was 25 innings, which was set in 1974 with a Cardinals win over the Mets 4-3 and was matched in 1984 by a game that saw the White Sox top the Brewers 7-6).

If you are going by time it would be the White Sox-Brewers game in 1984 that lasted 8 hours and 6 minutes.