Major League Baseball (MLB) rivalry between the New York Yankees and Boston Red Sox is known as Yankees-Red Sox. MLB’s American League (AL) has included the two clubs for more than a century, during which time they have built what is possibly the most ferocious rivalry in all of American sport.

Only the Yankees – Red Sox rivalry can be compared to other rivalries in terms of its historical relevance and reputation. In spite of more than a century of rivalry, the two clubs have seldom met one other in the playoffs.

Babe Ruth was traded to the Yankees by Red Sox owner Harry Frazee in 1919, which led to an 86-year skid without a World Series triumph for the Red Sox.

The “Curse of the Bambino” myth, which became one of the most well-known parts of the rivalry, was a result of this.

In 1978, the Yankees and Red Sox ended tied for first place, and the Yankees went on to win the division title in a high-profile tie-breaker game.

After the Red Sox held a 14-game advantage over the Yankees more than halfway through the season, the first-place tie occurred.

The Yankees also lost a best-of-seven series in 2004 after leading 3–0. Only once in baseball history has a club come back from a 0–3 deficit to win a series, the Red Sox.  The 86-year-old curse was broken when the Red Sox won the World Series.

According to some sports journalists, this match-up is the most intense rivalry in the world of sports.