professional
– NFL (National Football League)
– CFL (Canadian Football League)
– LFA (Liga de Fútbol Americano Profesional)
– ELF (European League of Football)
– X-League (Japan)
minor leagues/spring leagues
– USFL (United States Football League)
– PRAFL (Puerto Rico American Football League)
arena/indoor
– AFL (Arena Football League)
– AAL (American Arena League)
– IFL (Indoor Football League)
– NAL (National Arena League)
– TAL (The Arena League)
flag
– AFFL (American Flag Football League)
women’s
– WFA (Women’s Football Alliance)
– USWFL (United States Women’s Football League)
– Extreme Football League (X-League)
lingerie/bikini leagues (all are now in Mexico)
– (MLFL) Liga Mexicana de Football Lingerie
– PGFL (Pretty Girls Football League)
– ILBF (Liga Iberoamericana de Bikini Football)
collegiate conferences
– NCAA (USA)
– U Sports (Canada)
high school football
– HSFA (High School Football Association)
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