Thelma Jo Walmsley (1918–1997) was a Canadian baseball and softball player.

Walmsley played for the Racine Belles of the All-American Girls Professional Baseball League (AAGPBL) in the 1946 season.Leslie A. Heaphy and Mel Anthony May, Encyclopedia of Women and Baseball. McFarland & Company, 2016. . Prior to her stint with the Racine Belles, Walmsley played for the Montreal Royals of the Montreal Major Ladies' Softball League."Royals Are Coming!" The Globe and Mail, July 29, 1943.

In 1998, Walmsley was one of the Canadian women who played in the AAGPBL who were inducted as a group into the Canadian Baseball Hall of Fame."Remembering the Girls of Summer: First female players inducted in Canada's Baseball Hall of Fame". Ottawa Citizen, June 5, 1998. Her Racine Belles jacket is held in the collection of the Copper Cliff Museum in Walmsley's hometown of Copper Cliff, Ontario."Copper Cliff Museum". Greater Sudbury Heritage Museums.

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External links Thelma Walmsley