The World Series began October 24 and Game 7 was played on November 1, in which the Houston Astros defeated the Los Angeles Dodgers in seven games, to capture their first World Series championship in franchise history.
The 88th Major League Baseball All-Star Game was held on July 11 at Marlins Park, the home of the Miami Marlins. For the first time since 2002 when the game ended in a tie, the All Star Game did not determine home field advantage for the World Series. Instead, home field advantage was awarded to the team with the better regular season record. The American League won 2–1 in 10 innings.
After the 2019 season, Mike Fiers alleged that the 2017 Astros used technology to illicitly steal their opponents' signs and relay it to their hitters. The Astros used this method throughout the 2017 season, and part of the 2018 season. MLB and the Astros opened an investigation into this sign stealing allegation. MLB found the Astros used technology to cheat during their 2017 season and suspended Hinch and Astros' general manager Jeff Luhnow for one year; the Astros fired Luhnow and Hinch the same day. Alex Cora, who was the Astros bench coach in 2017 and the Red Sox manager from 2018–19, parted ways with the Red Sox after the scandal broke.