At the 1964 Games in Tokyo, Buck partnered with Susan Cunliffe-Lister, Countess of Swinton in the Women's Doubles B Table Tennis event, winning the gold medal. At the 1968 Games in Tel Aviv she spread out into a variety of other sports including lawn bowls, swimming, and three field athletics disciplines: discus, javelin, and shot put. She won gold in both the women's pairs and singles lawn bowls as well as the 25m backstroke swim. Her final gold medal came at the 1972 Games in Heidelberg for the women's pairs lawn bowls, and went on to gain further medals in 1976 before retiring for competitive sport.