From 65438 to 0954, Cousy began to prepare for the establishment of the NBA Players' Union (NBPA), and his idea was supported by Celtic boss walter brown. Cousy began to contact representatives of various teams, and all the representatives he contacted responded enthusiastically to him except fort wayne's boss who was a stubborn anti-union organizer. Cousy was the president of the first players' union. 1958, Tommy heinsen took his place as the player representative.

Anti-racist

Cousy has an anti-racial attitude both on and off the court. 1950, Celtic played in Charlotte, North Carolina, which was segregated at that time. His teammate Chuck Cooper was rejected by the hotel because he was black. Cousy also refused to stay in the hotel. He insisted on taking the night train with Cooper. Cooper can't use the same bathroom as white people. He had to go to the shabby colored bathroom. Cousy said that at that moment he was ashamed of being white. Cousy also sympathized with bill russell, a Celtic black player who was often hurt by racial discrimination. He and his wife have maintained a long-term friendship with Russell.