The 2023 Major League Baseball postseason is the elimination tournament held to determine MLB’s champion. Commencing October 3, the playoffs for each league—American and National—consist of two best-of-three wild-card playoffs contested by the worst-seeded division winner and the three wild card teams, two best-of-five Division Series featuring the wild-card winners and the two highest-seeded division winners, and finally the best-of-seven League Championship Series. The winners of the American League Championship Series (ALCS) and the National League Championship Series (NLCS) play each other in the best-of-seven World Series.