The worst season came in the 1951–52 tournament after a long relegation fight that came down to the end against Club América; they lost and were relegated for the first time in history to the newly created Segunda División de México. That year the club finished with a record of 3 wins, 6 draws, and 13 losses allowing 54 goals and only scoring 22 for a total of 12 points, just 3 behind Club América (who kept the category and is one of two clubs that has never been relegated since the professionalization of the sport in Mexico).