The bassist did not specify which band member is ailing in response to a fan question about their absence from the Back to the Beginning lineup.

Ozzy Osbourne's final concert with Black Sabbath raised $190 for charity. Proceeds for the July 5 show benefited Cure Parkinson's (which Osbourne suffers from), Birmingham Children's Hospital, and Acorn Children's Hospice.

After Metallica’s performance, Osbourne, 76, came out on stage and performed a five-song set by himself, before he was joined by his former bandmates Tony Iommi, Bill Ward and Geezer Butler for four of the group’s songs.