Eureka the Butcher

Marcellus Rodríguez-López (born September 29, 1983) is a Puerto Rican multi-instrumentalist musician and younger brother of Omar Rodríguez-López. He is best known as the keyboardist and percussionist of The Mars Volta and the drummer for Zechs Marquise. He also produces electronic music under the moniker Eureka the Butcher.