Jeff Erna is an American drummer, most notable for being the original drummer for Dropkick Murphys.While with the Dropkick Murphys, he played drums on their Boys on the Docks EP. He also played on The Early Years, Fire and Brimstone, Tattoos and Scally Caps and Dropkick Murphys/Ducky Boys Split 7 inch'and also the singles collection volume one.Erna was the first drummer for the Amerindie band the Blackjacks.