Every rivalry has an origin, a point where both sides can look back and point to as the reason why they absolutely can not stand the other team. Sometimes it boils down to geography. Other times, this can revolve around a few moments in time that change the trajectory of the teams involved.
November 25, 2012
After their defeat in the 2011 Clausura Liguilla at the hands of Tijuana, León faced another season in the Liga de Ascenso. Undeterred, they would win the 2012 Clausura and defeat Correcaminos UAT in the Final de Ascenso to be promoted back to the newly rebranded Liga MX, They were finally back in the Mexican first division after a decade.