He is best known as the lead vocalist of the Spanish pop rock band Hombres G. Summers was born in the Chamberí district of Madrid, Spain, to Manuel Summers Rivero, a Spanish film director and screenwriter of partial English descent, and Consuelo Rodríguez Marquez on 26 February 1964.

Madruga played the role of Summers' girlfriend in the 1987 film Sufre Mamón and it is speculated that she is the subject of such songs as "Marta tiene un marcapasos".

Rafa accepted David's invitation to join the rest of the group and they renamed themselves "Hombres G" after the 1935 James Cagney movie, G Men (which in Spain aired as Contra el imperio del crimen).

[5] Summers' songwriting lead and the newly launched label, Producciones Twins, helped the quartet establish a successful music career.

[9] In 2017 he released a collaboration with Aleks Syntek with the remake of the single El ataque de las chicas cocodrilo.