John Kiffmeyer is an American citizen.
El Sobrante ( Spanish for `` surplus '' or `` remaining land '' ; Spanish : [ el so.ˈβran.te ] ) is a census-designated place ( CDP ) in Contra Costa County , California , United States . John Kiffmeyer ( born July 11 , 1969 ) , known professionally in music as Al Sobrante , is an American musician , best known as the former drummer for the punk rock band Green Day . His name of Al Sobrante is a reference to his hometown , El Sobrante .