Drummer Mike Bordin, who fills in for founding member Bill Ward, will join original members Osbourne, Tony Iommi on guitar and Geezer Butler on bass. Bordin has previously played with Faith No More and Osbourne's solo band.
Also appearing at Ozzfest are: Judas Priest, Slayer, Dimmu Borgir, Superjoint Ritual and Zakk Wylde's Black Label Society. Slipknot will headline the second stage.
2014: The Year in Music [PHOTOS]