The rivalry is often a heated subject of conversation in the Northeastern United States. Since the inception of the wild card team and an added Division Series, the AL East rivals have squared off in the American League Championship Series three times, with the Yankees winning in 1999 and 2003 and the Sox winning in 2004. The two also faced off in the American League Division Series in 2018, with the Red Sox winning in four games. In addition, the teams have twice met in the last regular-season series of a season to decide the league title, in (when the Red Sox won) and (when the Yankees won).