Between 1857 and 1899 there has been eight Leagues that Major-Leagues.com is tracking. The table below lists those Leagues and sorts them according to Age, then First Year of play.
Each link goes to a League Page where you can find more information and individual season standings.
|National League||Major League||1876 to now||147 years old|
|American League (plus Western League predecessor)||Major League (plus Elite League predecessor)||1894 to now (WL+AL)|
1901 to now (AL)
|129 years old|
122 years old
|National Association of Base Ball Players||Proto-League||1857 to 1870||14 years old|
|American Association||Rival League||1882 to 1891||10 years old|
|National Association of Professional Base Ball Players||Elite League||1870 to 1875||5 years old|
|League Alliance||Rival League||1882||1 year old|
|Union Association||Rival League||1884||1 year old|
|Players League||Rival League||1890||1 year old|
Major-Leagues.com will be expanding this table as more standings are added.