Sports league
group of sports teams or individual athletes that compete against each other
Midlands 4 West
Midlands 4 West
Midlands 5 West
Midwest Prep Hockey League
Minneapolis City Conference
North Northumberland Football League
Miyazaki Phoenix League
Mizoram Premier League
National League
Monterey Peninsula Soccer League
National Basketball League of Canada
U Sports football
Mumbai Football League
Murray Football Netball League
International Swimming League
Nagaland Premier League
Naismith Cup
National Alliance of Basketball Leagues
National Amateur Cup
National Basketball Association Cheerleading
National Basketball League
National Basketball League
National Basketball League
National Camogie League
National Cheerleaders Association
National Christian College Athletic Association
National Football League (1902)
National Lacrosse Conference
National Lacrosse League (1974–75)
National League
National League 2 North
National League 2 South
National League 3 London & SE
National League 3 South West
National Premier Leagues
National Professional Soccer League
National Roller Derby League
National Soccer League
National Soccer League
National Soccer Youth League
National Star Soccer League
Neath & District League
Negro American League
Negro National League
Negro National League
Austrian National League
New England Collegiate Baseball League
Newcastle Roller Derby League
Newfoundland and Labrador Challenge Cup
Newport and District Football League