Major Series Lacrosse ( MSL) is a senior league founded in Ontario, Canada. Each year in September the playoff teams battle for the right to compete against the Western Lacrosse Association champion for the Mann Cup.
The championship is hosted alternately between Ontario and British Columbia. And most players in the league play or have played in the National Lacrosse League.
| 2006 Peterborough Lakers |
1946 St. Catharines Athletics |
| 2005 Peterborough Lakers |
1945 St. Catharines Athletics |
| 2004 Peterborough Lakers |
1944 St. Catharines Athletics |
| 2003 Brampton Excelsiors |
1943 Mimico-Brampton Combines |
| 2002 Brampton Excelsiors |
1942 Mimico Brampton Combines |
| 2001 Brampton Excelsiors |
1941 St. Catharines Athletics |
| 2000 Brooklin Redmen |
1940 St. Catharines Athletics |
| 1999 Brampton Excelsiors |
1939 St. Catharines Athletics |
| 1998 Brampton Excelsiors |
1938 St. Catharines Athletics |
| 1997 Niagara Falls Gamblers |
1937 Orillia Terriers |
| 1996 Six Nations Chiefs |
1936 Orillia Terriers |
| 1995 Six Nations Chiefs |
1935 Orillia Terriers |
| 1994 Six Nations Chiefs |
1934 Orillia Terriers |
| 1993 Brampton Excelsiors |
1933 Hamilton Tigers |
| 1992 Brampton Excelsiors |
1932 Mimico Mountaineers |
| 1991 Brooklin Redmen |
1931 Brampton Excelsiors |
| 1990 Brooklin Redmen |
1930 Brampton Excelsiors |
| 1989 Brooklin Redmen |
1929 Oshawa Generals |
| 1988 Brooklin Redmen |
1928 Oshawa Generals |
| 1987 Brooklin Redmen |
1927 Weston L.C. |
| 1986 Brooklin Redmen |
1926 Brampton Excelsiors |
| 1985 Brooklin Redmen |
1925 Weston L.C. |
| 1984 Peterborough Lakers |
1924 Weston L.C. |
| 1983 Peterborough Lakers |
1923 Weston L.C. |
| 1982 Peterborough Lakers |
1922 Weston L.C. |
| 1981 Brampton Excelsiors |
1921 Toronto Riverside |
| 1980 Brampton Excelsiors |
1920 Toronto St. Simon's Anglicans |
| 1979 Peterborough Red Oaks |
1919 Toronto St. Simon's Anglicans |
| 1978 Peterborough Red Oaks |
1918 Toronto Beaches |
| 1977 Brampton Excelsiors |
1917 Toronto Young Torontos |
| 1976 Brampton Excelsiors |
1916 Toronto Young Torontos |
| 1975 Brampton Excelsiors |
1915 Toronto Young Torontos |
| 1974 Windsor Warlocks |
1914 Brampton Excelsiors |
| 1973 Peterborough Lakers |
1913 Brampton Excelsiors |
| 1972 Brantford Warriors |
1912 Brampton Excelsiors |
| 1971 Peterborough Lakers |
1911 Toronto Young Torontos |
| 1970 Brantford Warriors |
1910 St. Catharines Athletics |
| 1969 Brooklin Redmen |
1909 St. Catharines Athletics |
| 1968 Brooklin Redmen |
1908 St. Catharines Athletics |
| 1967 Peterborough Don Byes |
1907 St. Catharines Athletics |
| 1966 Peterborough Pepsi Petes |
1906 No Champion |
| 1965 Brooklin Merchants |
1905 St. Catharines Athletics |
| 1964 Brooklin Merchants |
1904 Brantford |
| 1963 Brooklin Merchants |
1903 Brantford |
| 1962 Brampton Ramblers |
1902 Brantford |
| 1961 Port Credit Sailors |
1901 Orangeville Dufferins |
| 1960 Port Credit Sailors |
1900 Orangeville Dufferins |
| 1959 Peterborough Mercurys |
1899 Orangeville Dufferins |
| 1958 Wellend Switsons |
1898 Orangeville Dufferins |
| 1957 Peterborough Trailermen |
1897 Toronto Tecumseh |
| 1956 Peterborough Trailermen |
1896 Toronto Tecumseh |
| 1955 Peterborough Trailermen |
1895 Seaforth |
| 1954 Peterborough Trailermen |
1894 Stratford |
| 1953 Peterborough Trailermen |
1893 Stratford |
| 1952 Peterborough Timbermen |
1892 Stratford |
| 1951 Peterborough Timbermen |
1891 Niagara Falls |
| 1950 Owen Sound Crescents |
1890 St. Catharines Athletics |
| 1949 Hamilton Tigers |
1889 St. Catharines Athletics |
| 1948 Hamilton Tigers |
1888 Paris Brants |
| 1947 Mimico Mountaineers |
1887 Toronto |