[2] In 2004–05, Juanito netted four goals in 33 games as the side achieved qualification honours to the UEFA Champions League, also winning the Copa del Rey.

On 22 April 2007, in a 2–2 draw at RCD Espanyol, he played the last minutes as a goalkeeper due to the dismissal of Pedro Contreras, with a penalty being awarded – Raúl Tamudo equalised.

[6] His debut season was shaky, as he started as first-choice, was relegated to the bench, regained his position from Colombian Luis Perea and lost it again;[7][8] on 4 April 2010 he scored his first goal as a Colchonero, opening the 3–0 home victory over Deportivo de La Coruña.

Hence, Juanito fell further down in the defensive pecking order,[10] only appearing in a Spanish Cup match against Universidad de Las Palmas CF (1–1 home draw, after a 5–0 away win in the first leg);[11] on 11 January 2011, he terminated his contract with the club, moving to second-tier Real Valladolid shortly after.

[14] Juanito represented Spain at UEFA Euro 2004[15] and 2008 (playing in the 2–1 victory over Greece in the latter tournament)[16] and the 2006 FIFA World Cup, scoring with his head in the 1–0 defeat of Saudi Arabia.

[21] He was given his first job managing in his own right in June 2015, taking the reins at CD San Roque de Lepe for the upcoming Segunda División B campaign; he was sacked in March 2016, as they occupied a relegation place.