Rosendo was born in Madrid in 1954. Dropping out of engineering school as a young adult in order to play music full-time, he joined a cover band which, with some personnel changes, became the popular Spanish rock band Nu. After recording an album with the group, Rosendo split off in 1977 and formed a new group called Leño. Having reached a high level of popularity, that band broke up in the fall of 1983 and Rosendo wasted little time in embarking on a solo career, initiated by his 1985 release Loco por Incordiar. He recorded prolifically throughout the '80s and '90s, generating almost a record per year for two decades. Rosendo was awarded the Medalla de Oro al Merito en las Bellas Artes in 2006.