The 2026 MLB postseason has yet to produce extra-inning games through the Division Series and early League Championship Series rounds, keeping implied probabilities moderate for games reaching 12 or more innings. The ALCS remains tightly contested at 1-1 between the Guardians and Rays, with scheduling adjustments for weather potentially extending later contests, while the Brewers’ 3-0 NLCS lead over the Dodgers creates pressure for comebacks that often stretch into extras. Bullpen management, late-inning pitching matchups, and the high-stakes environment of best-of-seven series historically drive longer games, though 15-plus inning marathons remain uncommon. The remaining ALCS schedule and any NLCS or World Series extensions will shape whether the longest contest exceeds recent norms.