Tuesday's MEDICINE BALL CARAVAN rolls a slew of new releases by Rod Stewart, Dion DiMucci, Double Dog, Legendary Shack Shakers, My Morning Jacket, Sharon Van Etten, The Wallflowers, Fantastic Negrito and K.C. Jones. Plus: some Lil' Bob & the Lollipops, Susan Cowsill, Nina Simone, The Iceman Special and more.