Marjorie Leeming moved to Victoria with her family at the age of four. She was a member of the Victoria Lawn Tennis Club and although she specialized in grass court play, she was a formidable clay court player as well. In later years, Leeming became a professor of physical education at UBC and taught tennis, golf, and badminton.

Leeming captured four successive BC girls “Under-16” titles from 1915-18, becoming the permanent holder of the Pooley Cup. In 1919, at age sixteen, she played against world champion, Australian Norman Brooks, in a mixed doubles match, where she was partnered with Australia’s Gerald Patterson.

At the Victoria City clay court championships, she won five singles titles from 1922-26, four doubles titles in 1922-24 and 1926, and three mixed doubles titles in 1922-23 and 1926.

Leeming won the Oregon State singles title in 1926 over a highly favoured American competitor. She captured three Western Canadian championships, known then as the Mainland of BC championships in 1923 and 1925-26.

Leeming won seven BC titles: five singles in 1921 and 1923-26 and one doubles and one mixed doubles in 1925. She won the Canadian singles championship in 1925 and 1926 as well as being the runner-up in 1930-32. She won the Canadian doubles title in 1925, 1930, and 1932 and the mixed doubles in 1925 and 1930.

She was voted “Outstanding Tennis Player in BC” six times between 1923-31. She was ranked number one women’s tennis player in BC in 1930 and 1931, and was the second seeded Canadian badminton player in 1929.

Leeming won the Eastern Canadian singles and doubles titles in 1932. Also in 1932, she reached the third round of singles play before being defeated at Forest Hills, New York.