[2] In February 1980, he made his début with picadores in San Sebastián de los Reyes, where he shared billing with Carlos Aragón and Antonio Amores.

Standing as "godfather" this time was José María Manzanares, while Emilio Muñoz stood as witness; the fight was with the bull Bohemio, raised by Félix Cameno.

[5] On 26 September 1984, el Yiyo shared the billing in Pozoblanco with Francisco Rivera, known as "Paquirri", on the day when the latter was fatally wounded by a bull named Avispado, which he had assumed to be dead.

Having become a bullfighting benchmark and giving many fans hope for his prospects, and thus enjoying great popularity, on 30 August 1985, Cubero substituted for Curro Romero at the Colmenar Viejo bullring to perform alongside Antonio Chenel ("Antoñete") and José Luis Palomar, with bulls supplied by Marcos Núñez.

His funeral was held at Las Ventas in Madrid; on hand were authorities, fellow bullfighters and fans, and he was borne shoulder-high among the crowd to the Cementerio de la Almudena, where he was buried.