Mike Portnoy + Chad Szeliga Honor Adrenaline Mob's A.J. PeroMike Portnoy + Chad Szeliga Honor Adrenaline Mob's A.J. PeroMike Portnoy and Chad Szeliga joined Adrenaline Mob onstage Saturday night in New Jersey to honor late drummer A.J. Pero.Chad ChildersChad Childers