Mike Portnoy To Play With Stone Sour

In his post-Dream Theater incarnation as the sub of choice for some of the world’s hardest rocking bands – including Avenged Sevenfold and Dimmu Borgir – Mike Portnoy has now agreed to fill in when Stone Sour plays at Rock In Rio on September 24. Portnoy agreed to help out while the band’s drummer Roy Mayorga awaits the imminent birth of his first daughter, who is due on the day of the show.