Charter members playing American football (and years of membership) included: * Arizona (1931–1961) * Arizona State Teachers'-Flagstaff (now Northern Arizona; 1931–1952) * Arizona State Teachers'-Tempe (now Arizona State; 1931–1961) * University of New Mexico (1931–1951) * New Mexico A&M (now New Mexico State; 1931–1961). Other members competing in football (and years of membership) included: