The 2026 MLB postseason opens with Division Series matchups on October 3 featuring strong pitching staffs from teams like the Dodgers, Braves, Yankees, and Rays, setting the stage for potential extra-inning marathons similar to the 18-inning record games seen in recent years. The Wild Card round already produced one 10-inning contest between the Phillies and Braves, highlighting how close series and bullpen management can extend games. Factors such as deep rotations, high-leverage relievers, and balanced offenses in best-of-five and best-of-seven formats increase the likelihood of prolonged affairs, particularly in later rounds like the LCS or World Series where stakes amplify caution. Historical patterns show these marathons often hinge on late-inning rallies or shutdown pitching rather than early offense.