As an amateur golfer, Lenczyk competed at the
U.S. Women's Amateur consecutively between 1946 and 1949 and was the 1948 championship champion when the event was held at Pebble Beach. She has been honored by having the 5th hole of the course, The Hay, named "Grace" in recognition of her U.S. Women's Amateur by the Pebble Beach Company. Outside of the United States, Lenczyk won the 1947 and 1948
Canadian Women's Amateur and appeared at the 1948 and 1949
British Ladies Amateur. Apart from her amateur competitions, Lenczyk had her first professional win at the 1947
All American Open. During this time period, the
Women's Western Open and
Titleholders Championship were held as major championships. At these events, she reached the semifinals of the 1947
Women's Western Open and had a top eight finish at the
1948 Titleholders Championship. In team events, she was a member of the American team that won the
1948 and
1950 Curtis Cup. ==Death==