Marcellus Rodriguez-Lopez is percussionist in The Mars Volta and the Omar Rodriguez-Lopez Quintet.
Marcellus has been noted as to playing bongos, congas, drums, cymbals, maracas, and shekere.
He was also the keyboardist for the Omar Rodriguez-Lopez Quintet before the inclusion of Money Mark for the 2005 tour. Marcel is also the keyboardist for El Paso band Zechs Marquise.