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, every playoffs has featured one or both of the American League East rivals and they both have squared off in the American League Championship Series three times, with the Yankees winning twice in 1999 and 2003 and the Sox winning in 2004. The two teams faced off most recently in the 2018 American League Division Series where the Red Sox won in 4 games. In addition, the teams have twice met in the last regular-season series of a season to decide the league title, in 1904 (when the Red Sox won) and 1949 (when the Yankees won).