In 1945 the London Majors won the Ontario Baseball Association championship .
According to the Intercounty League 's 1998 book , the Majors won the league championship series in 1925 , 1936 , 1937 , 1947 , 1948 , 1951 , 1956 , 1969 and 1975 .
In 1945 the Majors   won the Ontario Baseball Association championship .
According to the Intercounty League 's 1998 book , the Majors won the league championship series in 1925 , 1936 , 1937 , 1947 , 1948 , 1951 , 1956 , 1969 and 1975 .