Grammy Award-winning session drummer in the 1970s who fell about crisis after his schizophrenia drove him to violence. He drummed for Derek as well as the Dominos, among additional groups. He is at the music group The Everly Brothers. Hal Blaine was his coach. He performed with Steely Dan around the album Pretzel Reasoning. He murdered his mom in 1983. He offers performed with Frank Zappa.