American League Teams - Sudden Death

Originally, the American and National Leagues were two separate leagues that only faced each other once in the World Series. They then merged and formed Major League Baseball, and the teams stayed in their divisions, with the teams with the best winning records facing each other in a best-of-7 World Series.

Some of the teams changed their names or moved to different cities. Eventually, the league began expanding and searching for new markets with new teams. But the teams from both leagues still weren't allowed to play against each other (Except in an All-Star Game and the World Series), so some teams were moved (Such as the Brewers) to the other league. (The NL used to have 16 and the AL 14.) Eventually, interleague play was finally allowed as the Astros moved to the American League to keep both leagues at an even 15.