

On October 5, the Red Sox also beat the Yankees in the 2021 American League Wild Card (play-in) Game, 6–2, which was held at Fenway Park. The two teams have also met once in the AL Division Series (ALDS), in 2018, with Boston winning 3–1, a series which included a 16–1 Red Sox win in Game 3 at Yankee Stadium, the most lopsided postseason loss for the Yankees in their history.

The Yankees won twice, in 19 while the Red Sox won in 2004. Until the 2014 season, every season's postseason had featured one or both of the AL East rivals since the inception of the wild card format and the resultant additional Division Series in 1995 they have faced each other in the AL Championship Series (ALCS) three times. The rivalry is often a heated subject of conversation, especially in the home region of both teams, the Northeastern United States.

This led to the popularization of a superstition known as the " Curse of the Bambino," which was one of the most well-known aspects of the rivalry. In 1919, Red Sox owner Harry Frazee sold star player Babe Ruth to the Yankees, which was followed by an 86-year period in which the Red Sox did not win a World Series. Both teams have competed in MLB's American League (AL) for over 120 seasons and have since developed what is arguably the fiercest rivalry in all of American sports. The Yankees–Red Sox rivalry is a Major League Baseball (MLB) rivalry between the New York Yankees and the Boston Red Sox. Locations of Boston Red Sox and New York Yankees
