The 2018 American League Division Series were two best-of-five-game series to determine the participating teams of the 2018 American League Championship Series. The three divisional winners, seeded first through third, and a fourth team—the Wild Card Game winner—played in two series. These matchups were: * (1) Boston Red Sox (East Division champions) vs. (4) New York Yankees (Wild Card Game winner): Red Sox win series 3–1. * (2) Houston Astros (West Division champions) vs. (3) Cleveland Indians (Central Division champions): Astros win series 3–0.