The Northern League was an independent professional baseball league located in the midwestern United States and Canada. From 1999 to 2002, it was merged with the Northeast League. The league folded in 2010, and many of its teams joined the American Association. There are currently plans for a revived version of the league.
Teams:
- Duluth-Superior Dukes (1993-2002)
- Rochester Aces (1993)
- Sioux City Explorers (1993-2005)
- Sioux Falls Canaries (1993-2005)
- St. Paul Saints (1993-2005)
- Thunder Bay Whiskey Jacks (1993-1998)
- Winnipeg Goldeyes (1994-2010)
- Fargo-Moorhead RedHawks (1996-2010)
- Madison Black Wolf (1996-2000)
- Schaumburg Flyers (1999-2010)
- Lincoln Saltdogs (2001-2005)
- Gary SouthShore RailCats (2002-2010)
- Kansas City T-Bones (2003-2010)
- Calgary Vipers (2005-2007)
- Edmonton Cracker-Cats (2005-2008)