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.
El Brazo Juan Alvarado Nieves (July 30, 1961 – October 15, 2013) was a Mexican Luchador (professional wrestler). He was best known under the ring name El Brazo (Spanish for "the Arm), which he used since his debut in 1980. Alvarado was part of the Alvarado wrestling family, which includes his father Shadito Cruz, five brothers who used the "Brazo" name at some point and several third generation wrestlers.