Men's Rugby Champions
| Champions | |||||
| Year | School | Year | School | Year | School |
| 2025 | Guelph* | 1991 | Queen's | 1957 | McGill |
| 2024 | Guelph | 1990 | Queen's | 1956 | McGill |
| 2023 | Guelph | 1989 | Queen's | 1955 | McGill |
| 2022 | Guelph | 1988 | Queen's | 1954 | McGill |
| 2021 | Guelph | 1987 | Queen's | 1953 | McGill |
| 2020 | No Competition (COVID-19) | 1986 | Queen's | 1952 | McGill |
| 2019 | Queen's | 1985 | Waterloo | 1951 | McGill |
| 2018 | Queen's | 1984 | York | 1950 | N/A |
| 2017 | Queen's | 1983 | Waterloo | 1949 | McGill |
| 2016 | Guelph | 1982 | Toronto | 1948 | McGill |
| 2015 | Queen's | 1981 | Toronto | 1947 | Toronto |
| 2014 | Queen's | 1980 | Toronto | 1946 | N/A |
| 2013 | Queen's | 1979 | Queen's | 1945 | N/A |
| 2012 | Queen's | 1978 | Queen's | 1940-44 | No Competition (War) |
| 2011 | Western | 1977 | Waterloo / Western | 1939 | Toronto |
| 2010 | McMaster | 1976 | York | 1938 | Toronto |
| 2009 | Queen's | 1975 | York | 1937 | Toronto |
| 2008 | McMaster | 1974 | Guelph | 1936 | Toronto |
| 2007 | Brock | 1973 | York | 1935 | Toronto |
| 2006 | McMaster | 1972 | Western | 1934 | Toronto |
| 2005 | McMaster | 1971 | Queen's | 1933 | Toronto |
| 2004 | Western | 1970 | Queen's | 1932 | McGill |
| 2003 | McMaster | 1969 | Toronto | 1931 | McGill |
| 2002 | McMaster | 1968 | Toronto | 1930 | McGill |
| 2001 | Queen's | 1967 | Western | 1929 | McGill |
| 2000 | Western | 1966 | Western | 1928 | McGill |
| 1999 | Western | 1965 | Queen's | 1927 | McGill |
| 1998 | Guelph | 1964 | Queen's | 1926 | McGill / Toronto |
| 1997 | Western | 1963 | Toronto | 1925 | Toronto |
| 1996 | Queen's | 1962 | Toronto | 1924 | Toronto |
| 1995 | Queen's | 1961 | Toronto | 1923 | Toronto |
| 1994 | Queen's | 1960 | Toronto | ||
| 1993 | Queen's | 1959 | McGill | ||
| 1992 | McMaster | 1958 | McGill | ||