17+ innings

Full rules

As written on Polymarket for “Will the longest game of the 2026 MLB Postseason last 17+ innings?”.

1. §1This market will resolve to "Yes" if the greatest number of innings played in any single game of the 2026 MLB Postseason equals or exceeds the listed number.
2. §2Otherwise, this market will resolve to "No".
3. §3A game counts at the number of innings in which play occurred, as recorded by MLB in the official box score.
4. §4A game that ends in the bottom of its final inning counts at that inning number, even though that inning was not completed.
5. §5A suspended game that is later resumed and completed counts as a single game at its final inning total.
6. §6A game that is shortened or called before completion counts at the last inning completed.
7. §7Only games in 2026 MLB Postseason games will count toward this market.
8. §8The 2026 MLB Postseason comprises the Wild Card Series, the Division Series, the League Championship Series, and the World Series.
9. Regular season games, exhibition games, and any tiebreaker or "Game 163" will not be considered part of the 2026 MLB Postseason.