American League of Professional Football was the first professional soccer league in the United States, existing for one season in 1894. It was also one...

National Football League (NFL) is a professional American football league that consists of 32 teams, divided equally between the American Football Conference...

National Football League is a professional American football league and was founded in 1920 as a combination of various teams from regional leagues such as...

list of current and defunct leagues of American football and Canadian football. Major: National Football League (NFL), 1920– Originally American Professional...

The Women's Professional American Football League (WPFL) was a women's professional American football league in the United States. With teams across the...

Details of the history of black players in professional American football depend on the professional football league considered, which includes the National...

major football leagues in either country. Currently, there are multiple professional football leagues in North America: the two longest-running leagues are...

The Professional Football League of America (PFLA) was an American football minor league that operated in the Midwest region of the United States from...

The American Football League (AFL) was a major professional American football league that operated for ten seasons from 1960 until 1970, when it merged...

and Canada. American football is played in Mexico both professionally and as part of the college sports system. A professional league, the Liga de Fútbol...

The American Professional Football League (APFL) was an indoor football league that was founded in 2003. After the 2012 season, most of the teams left...

Minor league football, also known as alternative football or secondary football, is an umbrella term for professional gridiron football that is played...

The All-American Girls Professional Baseball League (AAGPBL) was a professional women's baseball league founded by Philip K. Wrigley, which existed from...

the major league of American football. Beginning primarily as a sport of Midwestern industrial towns in the United States, professional football eventually...

Indoor Professional Football League (IPFL) was the new incarnation of the Professional Indoor Football League (PIFL), which started in 1998. Two of its teams...

The Alliance of American Football (AAF) was a professional American football minor league. The AAF consisted of eight centrally owned and operated teams...

The American Professional Soccer League (APSL) was a professional men's soccer league with teams from the United States and later Canada. It was formed...

first professional sport in the U.S. The National Football League was founded in 1920 as a combination of various teams from regional leagues such as...

American League of Professional Football (1894), the National Association Foot Ball League (1895), and the Southern New England Football League (1914)....

high-level professional league, most of which failed within a few years or, in the cases of the All-America Football Conference and 1960s American Football League...

The American Football League, also known retrospectively as the AFL III to distinguish it from earlier organizations of that name, was a professional American...

The United Football League (UFL) is a professional American football high-level minor league which started play in March 2024. The league was created following...

The American Indoor Football Alliance (AIFA) was a minor-professional American indoor football league based in the United States. Teams' typical operating...

list of teams that play in the major professional leagues in the United States and Canada: Major League Baseball (MLB), the National Football League (NFL)...

The Rivals Professional Football League (RPFL) is a low-level american football minor league owned by Quentin Hines and consisting of 12 teams in Michigan...

merger of the two major professional American football leagues in the United States at the time: the National Football League (NFL) and the American Football...

made the city of Philadelphia the first North American city to have all four of its major professional sports league teams play in the league championship...

The Professional Spring Football League (PSFL) was a proposed outdoor american football minor league slated to begin in 1992. The league was founded by...

The American Arena League (AAL) is a professional indoor football minor league that began playing in 2018. The league was initiated by a merger between...

league system is a series of professional and amateur soccer leagues based, in whole or in part, in the United States. Sometimes called the American soccer...