Early Baseball Leagues

Alexander Cartwright led the establishment of the Knickerbocker Base Ball Club, the first team believed to have played baseball under modern rules. In 1845, the club's by-laws committee formulated the Knickerbocker Rules, which in large part dealt with organizational matters and laid out rules for playing the game. In 1857, sixteen New York area clubs, including the ... read more

Federal League Logo
FL: 1914-1915 (2 seasons)

The Federal League of Base Ball Clubs, known simply as the Federal League, was an...

Players League Logo
PL: 1890-1890 (1 season)

The Players' National League of Professional Base Ball Clubs, popularly known as the Players' League...

Union Association Logo
UA: 1884-1884 (1 season)

The league was founded in September 1883 by the young St. Louis millionaire Henry Lucas....

American Association Logo
AA: 1882-1891 (10 seasons)

Beginning in May 1882 and continuing for a full decade, the Association became a significant...

National Association Logo
NA: 1871-1875 (5 seasons)

The National Association of Professional Base Ball Players (NAPBBP), or simply the National Association (NA),...

National Association of Base Ball Players Logo
NABBP: 1858-1870 (13 seasons)

The National Association of Base Ball Players (NABBP) was the first organization governing American baseball....