 This in-state rivalry dates back to 1923, with the Aztecs winning the initial meeting at home 12-2.Since then, the sides have met 51 more times, including every year from 1945–79, when the two competed in the same conference or were independents.After not facing one another between 1979–1991, the schools resumed the annual series from 1992–98, when both were members of the Western Athletic Conference.