Juan Roberto Seminario Rodríguez (born 22 July 1936) is a retired Peruvian football player, recognized as one of Peru's most important strikers.

Nicknamed "El Loco" he is the only Zaragoza player to have won the "Pichichi Trophy" (1961–62 La Liga).

[2] In 1959 he moved to Europe, joining Sporting CP of Portugal, where he would play 50 matches and score 21 goals, and be nicknamed Expresso de Lima.

[3] In 1961 he moved on to join Real Zaragoza in Spain where he became the top scorer in La Liga (with 25 goals in 30 matches) for the 1961–62 season.

In 1963 he joined Fiorentina of Italy before returning to Spain in 1964 to play for Barcelona where he was part of the squad that won the Inter-Cities Fairs Cup in 1965–66.