Avenged Sevenfold drummer James Owen Sullivan, also known as "The Rev", was found dead yesterday in his home, apparently of natural causes. The 28 year old musician was a founding member of the California based metalcore group, which was in the process of recording their fifth album. Avenged Sevenfold had also recently recorded a version of Pantera's "Walk" for a tribute album being assembled by Zakk Wylde.