The 2017 American League Division Series were two best-of-five-games series held to determine the participating teams in the 2017 American League Championship Series. The three divisional winners (seeded 1–3) and a fourth team—the winner of a one-game Wild Card playoff—played in two series.
For the first time, Major League Baseball sold presenting sponsorships to all of its postseason series; Doosan acquired presenting sponsorship to the ALDS,[5][6] and thus the series was officially known as the American League Division Series presented by Doosan.[7]
The Astros would go on to defeat the Yankees in the ALCS, then win the 2017 World Series over the National League champion Los Angeles Dodgers. It was the Astros first-ever World title.