John Mayer has tested positive for COVID-19 a second time, leading to the next four shows on his ‘Sob Rock’ tour being pushed back to May.The songster shared his diagnosis overnight (February 25), confirming that alongside himself, several members in his band have also wound up with the virus. It comes just days after Mayer’s touring drummer tested positive, with Questlove stepping in to fill his role at the band’s New York City gig.Whelp.