2018 American League Division Series
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 1–3, 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.
| 2018 American League Division Series | |||||||||||||
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| Teams | |||||||||||||
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| Dates | October 5–9 | ||||||||||||
| Television | TBS | ||||||||||||
| TV announcers | Brian Anderson, Ron Darling, and Lauren Shehadi | ||||||||||||
| Radio | ESPN | ||||||||||||
| Radio announcers | Jon Sciambi and Jessica Mendoza | ||||||||||||
| Umpires | Dan Bellino, Cory Blaser, Fieldin Culbreth, Angel Hernandez, D. J. Reyburn, Mike Winters (crew chief) | ||||||||||||
| Teams | |||||||||||||
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| Dates | October 5–8 | ||||||||||||
| Television | TBS | ||||||||||||
| TV announcers | Don Orsillo, Dennis Eckersley, and Hazel Mae | ||||||||||||
| Radio | ESPN | ||||||||||||
| Radio announcers | Dave Flemming and Jim Bowden | ||||||||||||
| Umpires | Chris Conroy, Chad Fairchild, Andy Fletcher, Jerry Layne (crew chief), Jeff Nelson, Tim Timmons | ||||||||||||
| ALWC | New York Yankees defeated Oakland Athletics, 7–2 | ||||||||||||
Under sponsorship agreements with T-Mobile, the series was formally known as the American League Division Series presented by T-Mobile. The Astros and Red Sox won their respective series, to advance to the Championship Series. This is the first time since 1999 that all four ALDS participants from the previous year returned to the ALDS this year.
The Red Sox went on to defeat the Astros in the ALCS, then win the 2018 World Series over the National League champion Los Angeles Dodgers.