Yankees–Red Sox rivalry

The Red Sox–Yankees rivalry is a Major League Baseball (MLB) rivalry between the Boston Red Sox and the New York Yankees. Both teams have competed in MLB's American League (AL) for over 120 seasons, and have developed what is considered by many to be the fiercest rivalry in American sports. Coined "The Rivalry" by some, the 1919 sale of star Red Sox player Babe Ruth to the Yankees popularized one of the most well-known aspects of the rivalry: a superstition known as the "Curse of the Bambino", attributed to Boston’s 86-year World Series drought which began upon Ruth’s sale to New York. Coincidentally, when the Red Sox broke the curse by winning the 2004 World Series, they defeated the Yankees in the ALCS after overcoming a 3-0 deficit.