The 2000 World Series, the 96th edition of Major League Baseball's championship series, featured a crosstown matchup between the two-time defending champion New York Yankees and the New York Mets, with the Yankees winning four games to one for their third straight championship and 26th overall. It marks, to date, the last World Series with a repeat champion. It was the first postseason Subway Series since 1956. The Yankees were in the World Series for the third straight year, fourth in the previous five, and 37th time overall—the most of any team in the , while the Mets made their fourth World Series appearance—the most of any expansion franchise in the and its first since winning the title in the 1986 World Series. Under the new Collective Bargaining Agreement between and the new World Umpires Association signed in 2000, the traditional National League and American League umpire was discontinued. All umpires reported to Major League Baseball, with an interim uniform. During the 2000 playoffs, the new umpire uniforms (black and cream shirts), with the Major League Baseball logo on the caps and shirts, were used for the first time. The Yankees were the first team to three-peat as champions since the 1972–1974 Oakland Athletics.