1884 – Undefeated
1885 – Undefeated
1887 – Undefeated
1899 – Undefeated
1909 – Undefeated
1913 – Undefeated
1934 – Undefeated
1947 – Undefeated
1956 – Undefeated
1975 – Undefeated
Championship History
1954 – Gummere Cup Champions
1958 – Gummere Cup Champions
1966 – Gummere Cup Champions
1967 – Gummere Cup champions
1969 – Gummere Cup Champions
1975 – Gummere Cup Champions
1994 – NEPSAC Champions
1986 – Undefeated
1992 – ISL Champions
1992 – NEPSAC Champions
1997 – ISL Champions
1997 – NEPSAC Champions
2012 – ISL Champions
2012 – NEPSAC Champions
2013 – ISL Co-Champions
2013 – NEPSAC Champions
2014 – ISL Champions
2014 – NEPSAC Champions
1985 – ISL Champions
1985 – NEPSAC Champions
2006 – NEPSAC Champions
2007 – NEPSAC Champions
2011 – ISL Champions
2011 – NEPSAC Champions
2013 – ISL Champions
2013 – NEPSAC Champions
1982 – ISL Champions
1993 – ISL Champions
1994 – ISL Champions
1998 – N.E. Champions
1909 – N.E. Private School Champions
1913 – N.E. Private School Champions
1917 – Massachusetts State Prep School Champions
1920 – Greater Boston Prep School League Champions
1924 – Greater Boston Prep School League Champions
1936 – N.E. Prep School Champions
1959 – Private School League Champions
1960 – Private School League Champions
1961 – Private School League Champions
1962 – Private School League Champions
1976 – ISL Eberhart Division Champions
1981 – ISL Eberhart Division Champions
1982 – ISL Eberhart Division Champions
1983 – ISL Eberhart Division Champions
1984 – ISL Eberhart Division Champions
1985 – ISL Eberhart Division Champions
1986 – ISL Eberhart Division Champions
1987 – ISL Eberhart Division Champions
1988 – ISL Eberhart Division Champions
1989 – ISL Eberhart Division Champions
1990 – ISL Eberhart Division Champions
1991 – ISL Eberhart Division Champions
1992 – ISL Eberhart Division Champions
1992 – N.E. Champions
1993 – ISL Eberhart Division Champions
1994 – ISL Eberhart Division Champions
1997 – ISL Eberhart Division Champions
1998 – ISL Eberhart Division Champions
1999 – ISL Eberhart Division Champions
2000 – ISL Eberhart Division Champions
2001 – ISL Eberhart Division Champions
2002 – ISL Eberhart Division Champions
2003 – ISL Eberhart Division Champions
2015 – NEPSAC Champions
2016 – NEPSAC Champions
2020 – ISL Eberhart Division Champions
2022 – ISL Eberhart Division Champions
2023 – ISL Eberhart Division Champions
1951 – Private School League Champions
1954 – Private School League Champions
1972 – ISL Champions
1972 – NEPSAC Champions
1973 – NEPSAC Champions
1999 – ISL Champions
1999 – NEPSAC Champions
2006 – ISL Champions
2006 – NEPSAC Champions
2008 – ISL Champions
2008 – NEPSAC Champions
2009 – ISL Champions
2009 – NEPSAC Champions
2011 – ISL Champions
2012 – ISL Champions
2012 – NEPSAC Champions
1993 – NEPSAC Small School Champions
1999 – NEPSAC Champions
1951 – N.E. Interscholastic Champions
1962 – Graves-Kelsey Champions
2016 – NEPSAC Champions
2000 – NEPSAC Champions
1908 – Undefeated
1952 – Private School League Champions
1954 – Private School League Champions
1958 – Private School League Champions
1959 – Private School League Champions, Undefeated
1960 – Private School League Champions
1963 – Private School League Champions
2004 – ISL Championship
1960 – Private School League Champions
1961 – Private School League Champions
1964 – Private School League Champions
1968 – Private School League Champions
1977 – ISL Champions
1978 – ISL Champions
1983 – ISL Champions
1984 – ISL Champions
1985 – ISL Champions
1988 – ISL Champions
1991 – Undefeated ISL Champions
1987 – ISL Champions
1999 – ISL Champions
2000 – ISL Champions
2015 – ISL Champions
2016 – ISL Co-Champions
2018 – ISL Co-Champions
2019 - ISL Champions, Undefeated Season
2015 – NEPSAC Champions
1922 – Prep School Champions
1952 – Private School League Champions
1960 – Private School League Champions
1963 – Private School League Champions
1971 – Private School League Champion
1988 – NEIRA Champions, Nationals Medalists
1989 – NEIRA Medalists, National Champions
1991 -- NEIRA Medalists
1995 -- NEIRA Medalists, Nationals Medalists
1996 -- 2x NEIRA Medalists, Nationals Medalists
1997 -- NEIRA Medalists
2008 – NEIRA Medalists
2010 – NEIRA Medalists
2012 – NEIRA Medalists
2015 – 2x NEIRA Champions, 3x NEIRA Medalists
2017 – NEIRA Champions, 2x NEIRA Medalists
2019 – NEIRA Champions, 2x NEIRA Medalists
1932 – Undefeated
1975 – NEIRA Champions
1988 – NEIRA Champions
2000 – NEIRA Champions