The Immaculate Mustangs have a strong tradition of athletic excellence. 

Connecticut State Champions:

Men's Basketball 1976

Women's Soccer (Class"S") 1995, 2003, 2004, 2005, 2006, 2008, 2009

Men's Soccer (Class "S") 1996, 1997

Women's Lacrosse (Class "S") 2009

Men's Ice Hockey (DII) 1986, 2007

Men's Baseball (Class "S") 2001, 2003, 2004

Football (Class "S") 1986

Women's Cross Country 1997; Moira Kenny, 2009

Wrestling (Class "S") Julian Christe, 2007; Gavin Buckley, 2009

Southwest Conference Champions

Men's Ice Hockey 2000, 2003, 2007

Men's Basketball 1997

Women's Soccer 1995, 2004, 2005

Western Connecticut Conference Champions

Men's Ice Hockey 1984, 1985, 1986, 1987, 1988, 1989, 1990, 1991

Men's Basketball 1987 

Golf 1970, 1971, 1972, 1973, 1974, 1978, 1988

Baseball 1974, 1981

Softball 1981, 1991

Football 1985, 1986

Women's Basketball 1989, 1992

Cross Country 1970