The greatest testament to the athletic talents of Marion Potts Mather comes from an old Boston Herald clipping uncovered in the Sargent College archives. After praising her skill and ability, the article goes on to state that had "Pottsey" been a male, she would have made any of the men's varsity teams.
However, intercollegiate athletics did not exist for women in the 1930s, and the only venue for Mather to showcase her talent and gain notoriety was through the interclass competition.
Complementing her individual skill, Mather was also an accomplished team player, and her teams dominated the opposition in such sports as volleyball, field hockey, lacrosse, and basketball.
A highly competitive athlete, she also pursued head-to-head competition, and enjoyed success in track and horseback riding.
Entering her senior year, Mather received one of Sargent College's highest forms of tribute. In recognition of her outstanding athletic skills and sportsmanship, she was selected to coach the underclass teams.