Luis Héctor Cristaldo Ruiz Díaz (born August 31, 1969, in Formosa, Argentina) is an Argentine-born Bolivian football midfielder.
He is Bolivia's national team record cap holder alongside Marco Sandy.
Cristaldo then began attending the prestigious Tahuichi football academy, and by the time he was 18 years old he made his official debut in first division.
He played for Bolivian teams Oriente Petrolero (1990–92) and Bolívar (1993–98), winning 4 national titles combined during those years.
[2] Cristaldo made his international debut on September 10, 1989, in a World Cup Qualifier against Uruguay in Montevideo (2–0 loss) and equalled Sandy's record in his final match against Brazil in October 2005.