The Nationals rallied from an early 3–0 deficit to defeat the Brewers by a final score of 4–3 to advance to the NLDS.

Gerrit Cole outdueled Tampa Bay’s Blake Snell in a Game 2 pitcher’s duel as the Astros took a 2–0 series lead headed to St. Petersburg.

In Game 3, the Rays’ offense came alive as Kevin Kiermaier, Ji-man Choi, Brandon Lowe, and Willy Adames all homered in a blowout win.

Masahiro Tanaka pitched five solid innings as the Yankees again blew out the Twins to take a 2–0 series lead headed to Minneapolis.

Gleyber Torres ignited the Yankees’ offense in Game 3 as they won 5-1 to complete yet another sweep of the Twins.

The Nationals upset the 106-win Dodgers in five games to return to the NLCS for the first time since 1981, when the team was then known as the Montreal Expos.

In Game 2, Stephen Strasburg out-dueled Clayton Kershaw as the Nationals prevailed by two runs to even the series.

Max Scherzer pitched seven solid innings in Game 4 as the Nationals won 6–1 to even the series headed back to Los Angeles.

Mike Foltynewicz pitched seven innings of shutout ball in Game 2 as the Braves won 3-0 to take a 2–0 series lead headed to St. Louis.

In Game 3, the Cardinals led 1-0 after eight innings, but the Braves put up three unanswered runs in the top of the ninth, capped off by a two-run RBI single from Adam Duvall, to take the series lead.

Game 4 went into extra innings, and would be won by the Cardinals thanks to a sacrifice fly from Yadier Molina, sending the series back to Atlanta.

In Game 5, the Cardinals struck with ten runs in the top of the first as they prevailed in a blowout win to advance to the NLCS.

History once again repeated itself, and the Astros defeated the Yankees in six games to return to the World Series for the second time in three years.

In Game 2, the Astros prevailed after eleven innings thanks to a walk-off home run from Carlos Correa.

In the Bronx, the Astros stole Game 3 on the road thanks to a solid pitching performance from Gerrit Cole.

The Yankees would send the series back to Houston with a 4–1 win in Game 5, but the Astros ultimately capped off the series with a walk-off two-run home run by Jose Altuve off Aroldis Chapman in the bottom of the ninth inning of Game 6, securing the pennant.

Then, Howie Kendrick hit a two-run home run to put the Nationals in the lead for good.

The Nationals then scored three more unanswered runs in the top of the eighth and ninth innings to complete a major upset and secure the title.

Despite the win, no MLB team from the nation's capital had won a home game in the World Series since 1933.