World Series appeared in 9 and won 5. As of 2018, no team has won consecutive World Series championships since the New York Yankees in , , and —the longest such drought in Major League Baseball history. Until the formation of the American Association in 1882 as a second major league, the National Association of Professional Base Ball Players (1871–1875) and then the National League (founded 1876) represented the top level of organized baseball in the United States. All championships were awarded to the team with the best record at the end of the season, without a postseason series being played. From
1912 World Series of , , , and . Other World Series won by the home team in its last at-bat in a Game 7 include the Series of 1924, , 1991, 1997, and . The 1913 "Spalding's Official Baseball Guide" said of the 1912 World Series, "No individual, whether player, manager, owner, critic or spectator, who went through the world's series of 1912 ever will forget it. There never was another like it. Years may elapse before there shall be a similar series and it may be that the next to come will be equally sensational, perhaps more so." 1912 World Series