Big Sir is Juan Alderete's what?
Juan Alderete Juan Alderete de la Peña (born September 5, 1963) is a Mexican-American musician, best known as the longtime bassist of Racer X and The Mars Volta.
The Most Excellent The Most Excellent (Spanish: Excelentísimo Señor, male, or Excelentísima Señora, literally "Excellent Senior/Mister") is an honorific prefix that is traditionally applied to certain people in Spain and certain Spanish-speaking countries. The honorific is mainly used in written documents and its retention after the holder leaves office is left for the most important positions of the state.