Drummer for the heavy metal band Avenged Sevenfold. He previously played in the punk rock band Bad Religion; he has worked with various other acts, including The Vandals.
He was in a band called Bad4Good, which was mentored by Steve Vai.
He has toured with Tenacious D and Avril Lavigne.
He has two brothers named Chad and John.
His brother, Chad Wackerman, has worked with Frank Zappa.