National Lacrosse Association (Eastern Division) 1968 -1968
Eastern Lacrosse Association 1969 -1969
Ontario Lacrosse Association – Senior ‘A’ League 1969 – 1971
National Lacrosse League (Eastern Division) 1972 -1972
Major Series Lacrosse 1973 –
1932-1941 Brampton Excelsiors merged with Mimico
1932-1940 Fergus Thistles folded
1932-1935 Hamilton Tigers merged with Burlington
1932-1932 Mimico Canucks folded
1932-1941 Mimico Mountaineers merged with Brampton
1932-1932 Toronto National Sea Fleas folded
1932-1933 Toronto Native Sons folded
1932-1932 Niagara Falls Cataracts folded
1932-1933 Orangeville Dufferins folded
1932-1932 Toronto Marlboros renamed Toronto Nats
1933-1934 Brantford Spaldings folded
1933-1934 Malvern Grads folded
1933-1934 Mount Dennis Firemen folded
1933-1933 Toronto Oakwoods renamed Oakwood Bulldogs
1933-1933 Ohsweken Indians folded
1933-1940 Orillia Terriers suspended operations
1933-1933 Port Dalhousie Lakesides folded
1933-1933 Richmond Hill Young Canadians folded
1933-1957 St. Catharines Athletics transferred to Welland-Crowland
1933-1933 Toronto Nats suspended operations
1934-1934 Oakwood Bulldogs folded
1935-1935 Toronto Maple Leafs renamed Toronto Marlboros
1935-1935 Burlington Beavers merged with Hamilton Tigers
1935-1935 Burlington Braves folded
1936-1936 Hamilton-Burlington Combines suspended operations
1936-1936 Oshawa Lacrosse Club folded
1936-1937 Toronto Marlboros folded
1938-1938 Hamilton-Burlington Combines merged team dissolved
1937-1937 Brantford Native Sons renamed Brantford Grands
1938-1938 Brantford Grands folded
1939-1942 Hamilton Tigers suspended operations
1941-1942 Etobicoke Indians folded
1942-1943 Mimico-Brampton Combines merged team dissolved
1942-1942 Owen Sound Georgians suspended operations
1943-1943 Brampton Army Bullets folded
1943-1944 Toronto Lakeshores folded
1944-1944 Burlington Braves folded
1944-1944 Brampton Excelsiors merged with Lakeshore
1944-1954 Mimico Mountaineers suspended operations
1945-1945 Brampton-Lakeshore Combines merged team dissolved
1945-1945 Hamilton-Burlington Combines merged team dissolved
1946-1946 Barrie Lakeshores transferred to Weston
1946-1953 Brampton Excelsiors suspended operations
1946-1954 Hamilton Tigers renamed Hamilton Lincoln Burners
1946-1946 Orillia Terriers folded
1946-1947 Owen Sound Georgians renamed Owen Sound Crescents
1947-1948 Weston West Yorks renamed Weston Lacrosse Club
1948-1948 Fergus Thistles suspended operations
1948-1950 Owen Sound Crescents suspended operations
1949-1949 Peterborough Lumberjacks renamed Timbermen
1949-1949 Weston Lacrosse Club renamed Weston Lions
1950-1952 Peterborough Timbermen renamed Trailermen
1950-1950 Toronto Ravinas renamed Toronto West York Motors
1950-1950 Weston Lions merged with Toronto Ravinas
1951-1953 Fergus Thistles suspended operations
1951-1952 Toronto West York Motors transferred to Orillia
1952-1952 Owen Sound Crescents folded
1953-1953 Orillia West York Motors folded
1953-1957 Peterborough Trailermen renamed Timbermen
1955-1956 Fergus Thistles folded
1955-1958 Hamilton Lincoln Burners folded
1956-1956 Long Branch Monarchs renamed Pontiacs
1957-1957 Long Branch Pontiacs renamed Monarchs
1958-1960 Brampton Excelsiors renamed Ramblers
1958-1958 Long Branch Monarchs renamed Dixie Castrols
1958-1958 Mimico Mountaineers folded
1958-1958 Peterborough Timbermen renamed Mercurys
1958-1959 Welland-Crowland Switsons transferred to St. Catharines
1959-1959 Long Branch Dixie Castrols folded
1959-1960 Peterborough Mercurys suspended operations
1960-1965 Port Credit Sailors folded
1960-1966 St. Catharines Athletics folded
1961-1962 Brampton Ramblers renamed Sealtests
1961-1963 Brooklin Hillcrests renamed Merchants
1961-1961 Niagara Falls Scobies folded
1963-1964 Brampton Sealtests renamed Excelsiors
1964-1966 Brooklin Merchants renamed Redmen
1964-1965 Peterborough Speedy Erns renamed Pepsi Petes
1964-1965 Huntsville Hawks folded
1965-1968 Brampton Excelsiors transferred to Bramalea
1966-1966 Peterborough Pepsi Petes renamed Don Byes
1966-1969 Toronto Maple Leafs folded
1967-1973 Brooklin Redmen suspended operations
1967-1967 Peterborough Don Byes renamed Lakers
1968-1968 Detroit Olympics folded
1968-1968 Hastings Legionnaires folded
1968-1973 Peterborough Lakers suspended operations
1968-1968 Mississauga Braves folded
1968-1968 Montréal Canadiens folded
1969-1969 Bramalea Excelsiors transferred to Brampton
1969-1975 Brantford Warriors folded
1969-1970 Huntsville Hawks folded
1969-1969 Kitchener Nationals folded
1969-1969 St. Catharines Golden Hawks folded
1970-1973 Brampton Excelsiors suspended operations
1971-1972 Aurora Astros folded
1972-1972 Fergus Thistles suspended operations
1972-1972 Owen Sound North Stars suspended operations
1972-1972 Point Edward Beavers folded
1972-1972 Six Nations Braves suspended operations
1972-1974 Toronto Shooting Stars folded
1972-1972 Wallaceburg Red Devils folded
1972-1972 Windsor Warlocks suspended operations
1974-1978 Fergus Thistles suspended operations
1974-1978 Owen Sound North Stars suspended operations
1974-1977 Six Nations Braves folded
1974-1974 Windsor Warlocks folded
1975-1986 Brampton Excelsiors suspended operations
1976-2018 Brooklin Redmen renamed Brooklin Lacrosse Club
1978-1978 Orangeville Dufferins folded
1978-1981 Peterborough Red Oaks renamed Lakers
1978-1978 Windsor Warlcoks folded
1979-1979 Ohsweken Warriors folded
1980-1983 Fergus Thistles suspended operations
1981-1985 Owen Sound North Stars suspended operations
1981-1985 Scarborough Saints suspended operations
1982-1987 Peterborough Lakers renamed Quakers
1984-1985 St. Catharines Athletics folded
1987-1996 Fergus Thistles folded 1987-
1988 Mississauga Renegades folded
1987-1989 Orangeville Northmen folded
1987-1995 Owen Sound North Stars folded
1987-1988 Sarnia Lumley Wrecking folded
1987-1987 Scarborough Saints folded
1988-2020 Brampton Excelsiors suspended operations / relocated to Owen Sound
1988-1993 Peterborough Quakers renamed Lakers
1993- Six Nations Chiefs
1994- Peterborough Lakers
1997-1997 Niagara Falls Gamblers transferred to Buffalo
1998-2005 Akwesasne Thunder renamed St. Regis Indians
1998-1998 Buffalo Gamblers folded
1998-1998 Huntsville Hawks folded
1998-1999 Ohsweken Wolves folded
1999-2005 St. Catharines Athletics folded
2004-2004 Windsor Warlocks folded
2005-2009 Barrie Lakeshores folded
2006-2015 Kitchener-Waterloo Kodiaks transferred to Cobourg
2006-2009 St. Regis Indians folded
2010-2012 Ajax Rock transferred to Oakville
2013-2021 Oakville Rock suspended operations
2016- Cobourg Kodiaks
2019- Brooklin Lacrosse Club
2021-2021 Owen Sound Lacrosse renamed North Stars
2022- Brampton Excelsiors
2022-2022 Owen Sound North Stars suspended operations
2024- Oakville Rock
2024- Owen Sound North Stars
