She continued her tennis and education at Rollins College (graduating in 1943),[3][4][5][6] where she was a member of Kappa Alpha Theta sorority.

Betz won the first of her four singles titles at the U.S. Championships in 1942, saving a match point in the semifinals against Margaret Osborne while trailing 3–5 in the final set.

She won the Wimbledon singles title in 1946, defeating Louise Brough in the final, the only time she entered the tournament, without losing a set.

[10] At the 1946 French Championships, held that year after Wimbledon, she lost the final in three sets to Margaret Osborne after failing to convert two match points.

[16] Pauline Betz won the Cleveland Women's World Professional Championships in 1953, 1955, and 1956, defeating Doris Hart, the reigning U.S. champion, in the 1956 final.

She is buried with her husband Bob Addie in a double plot in St Gabriel Cemetery in Potomac, Maryland.

[7] The Pauline Betz Addie Tennis Center at Cabin John Regional Park in Potomac, Maryland, was renamed in her honor on May 1, 2008.