**Multiple tight Division Series, including several 2-0 and 2-1 leads entering October 7 games, set the stage for extended contests as underdogs battle for survival in elimination scenarios.** The Rays lead the Yankees 2-0, the White Sox lead the Guardians 2-0, the Dodgers lead the Braves 2-1, and the Brewers lead the Padres 2-1, with potential Game 5s scheduled for October 9-10 that often feature cautious bullpen management and low-scoring affairs. Historical postseason data shows five 18-inning games since 2005, including the most recent in the 2025 World Series, underscoring that deep extra-inning marathons remain possible though uncommon. Trader consensus reflects elevated odds for at least 11 innings due to these competitive matchups and the full postseason slate through the World Series, while probabilities decline sharply for 14+ or 15+ innings given the rarity of such extremes.