What Is 2017 Major League Baseball postseason

Overview

The 2017 Major League Baseball postseason was a high-stakes playoff tournament that determined the World Series champion following the regular season. It featured 10 teams—five from each league—and culminated in a dramatic, historic World Series between the Houston Astros and Los Angeles Dodgers.

The postseason began with the Wild Card Games and advanced through the Division Series, League Championship Series, and ultimately the World Series. This year’s playoffs were notable for high-scoring games, record-setting home runs, and a controversial finish that later sparked investigation into sign-stealing allegations.

• Houston Astros: Won their first-ever World Series title by defeating the Los Angeles Dodgers in seven games, finishing the series on November 1, 2017.
• Wild Card Games: Held on October 4, 2017, with the New York Yankees defeating the Minnesota Twins and the Yankees advancing to the ALDS.
• Home run record: A total of 102 home runs were hit during the 2017 World Series, setting a new record for the most in any single postseason series.
• Dodgers’ path: The Los Angeles Dodgers swept the Arizona Diamondbacks in the NLDS and defeated the Chicago Cubs in five games in the NLCS to reach the World Series.
• AL dominance: For the first time since 2007, an American League team won the World Series, breaking the National League’s four-year championship streak.

How It Works

The MLB postseason format in 2017 included multiple rounds, each using a best-of series structure to determine advancement. The system rewards regular-season performance with seeding advantages and home-field advantage in the World Series, which was awarded to the AL champion due to the AL winning the All-Star Game.

• Wild Card Game: A single-elimination game between the two non-division-winning teams with the best records in each league, introduced in 2012 to expand playoff access.
• Division Series (ALDS/NLDS): Best-of-five series using a 2-2-1 home-field format, with the higher seed hosting Games 1, 2, and 5.
• League Championship Series (ALCS/NLCS): Best-of-seven series determining each league’s representative in the World Series, played in a 2-3-2 format.
• World Series: The final best-of-seven series between the AL and NL champions, with home-field advantage going to the league that won the All-Star Game.
• Seeding: Division winners were seeded 1–3 based on win-loss record, with Wild Card teams always seeded 4th and 5th regardless of record.
• Home-field advantage: The American League had home-field advantage in the 2017 World Series because the AL won the 2017 All-Star Game 2–1.

Comparison at a Glance

Below is a comparison of key performance metrics between the two World Series teams during the 2017 postseason:

The table illustrates that while the Dodgers had a slight edge in runs scored and home runs, the Astros’ timely hitting and strategic use of their bullpen helped them secure more wins in critical games. Game 5 of the World Series, which lasted over five hours and included 20 combined runs, was the highest-scoring postseason game in MLB history.

Why It Matters

The 2017 MLB postseason had a lasting impact on the sport, both for its on-field drama and the controversies that emerged afterward. It showcased the growing dominance of power hitting and advanced analytics in modern baseball, while also raising ethical questions about competitive integrity.

• Historic championship: The Astros’ first title was celebrated in Houston but later overshadowed by the 2019 revelation of an illegal sign-stealing scheme during the 2017 season.
• Record viewership: Game 7 of the World Series drew over 25 million viewers, making it the most-watched MLB game in over a decade.
• Rookie impact: Dodgers’ Cody Bellinger and Astros’ Alex Bregman emerged as stars, signaling a new generation of MLB talent.
• Long games: Multiple games exceeded four hours, prompting MLB to consider pace-of-play reforms in subsequent seasons.
• Global attention: The series boosted MLB’s international profile, especially in Latin America due to the Astros’ strong roster of Latin players.
• Legacy: Despite controversy, the 2017 postseason remains one of the most memorable due to its competitive balance and dramatic finishes.

In summary, the 2017 MLB postseason was a landmark event that combined athletic excellence with narrative complexity, setting the stage for ongoing conversations about sportsmanship and innovation in baseball.