Sacramento Surge (WLAF - 1991-1992)
San Antonio Riders (WLAF - 1991-1992)
San Antonio Wings (WFL - 1975)
San Francisco Demons (XFL - 2001)
San Jose Wolves (AIFA - 2010)
Scotland Claymores (NFL Europe - 1998-2004)
Scotland Claymores (World League - 1995-1997)
Shreveport Steamer (WFL - 1974-1975)
South Carolina Force (AIFA - 2009)
South Florida Bulls (NCAA-Big East - 1997-present)
Southern California Sun (WFL - 1974-1975)
Steubenville Stampede (AIFL - 2006)
Syracuse Soldiers (AIFL - 2006)