He studied voice mostly in his hometown; then he took additional lessons, among others with Giuseppe Valdengo. After first appearances in the
Spanish provinces and after winning a few prizes in 2004 and 2005, he was hired to Nice, Madrid (Auditorio Nacional) and Sevilla.
He sang opera and zarzuela all around Spain before jumping in as Andrea Chénier at the Teatro Real in Madrid in 2010. Now his career took
steam, and he sang Don José at the Arena di Verona, in Palermo and Naples. Three important debuts in 2012: La Scala and Vienna
Staatsoper, both as Radames; Maggio Musicale Fiorentino, as Calaf. Before long, he sang at the Deutsche Oper Berlin, in Munich, Hamburg, Dresden,
Tokyo, Monte Carlo, Chicago, at the Metropolitan Opera (Radames, 2017) and at Covent Garden (Canio, 2023). He was successful enough to return to
most of those theaters.
I heard him once in his most frequently performed role, Radames; his voice is large and dramatic, and though I was not quite as dismayed at his
singing as the founder of Historical Tenors, François Nouvion, I'm still surprised at de León's first-rate career.
Reference 1, reference 2, reference 3