High Quality Content by WIKIPEDIA articles! After a tumultuous six-year existence, the National Association of Professional Base Ball Players (NA), folded following the 1875 season. The National League of Professional Base Ball Clubs (NL) was formed in Chicago, Illinois by businessman, and owner of the Chicago White Stockings, William Hulbert, for the purpose of replacing the NA, which he believed to have been corrupt, mismanaged, full of rowdy, drunken ballplayers, and under the influence of the gambling community. One of the new rules put into place by the new league was that all teams had to be located in cities that had a population of 75,000 or more. The initial NL season began with eight teams, and they were asked to play seventy games between April 22 and October 21. The NL is considered to be the first "major league", although it has been argued that the NA can make that claim.