 In 1977–1978 the club once again failed to qualify finishing 12th overall just 4 points behind Atlético Español who earned the last playoff spot.The club had a record of 5–29–4 only scoring 19 goals and allowing only 18.In 1978–79 the club finished 17th overall with 39 points 6 more than the last place Toros Neza with a record of 5 wins 24 draws and 9 losses scoring 25 goals and allowing 34.In the 1979–80 tournament the club finished tied in the last place along with Unión de Curtidores and so the clubs had to play a relegation series; Unión de Curtidores came out with a 4–3 victory keeping its place in the Mexican First Division
CD Oro ended relegated and hasn't been able to come back to the Mexican First Division ever since.