The World Series games can go beyond nine innings, with the record for the longest game being 18 innings. The most famous 18-inning World Series game occurred in 2018 (Dodgers vs. Red Sox, Game 3), and a recent 18-inning game in 2025 (Dodgers vs. Blue Jays, Game 3) tied that record. So, the maximum number of innings played in a World Series game to date is 18, though most games are decided in nine innings.