In January, the former Black Sabbath frontman announced that he had cancelled all of his upcoming shows and was retiring from touring because he is "not physically capable" of putting on shows night after night due to a string of health issues. However, during a recent appearance on SiriusXM's Ozzy Speaks on his Ozzy's Boneyard channel the 74-year-old told co-host Billy Morrison that the situation could change in the future "I've come to the point where (wife and manager) Sharon says to me, 'You know what, the truth of the matter, you can't keep booking tours and failing, cancelling.