Rock radio personality Jim Ladd died on Saturday (12/16) at the age of 75 after suffering a heart attack. Ladd, who was a prominent figure in rock radio in the 1970s and 1980s hosting shows at KLOS-FM and KMET-FM in Los Angeles, had been hosting a regular show on SiriusXM’s Deep Tracks channel for the past 11 years. Ladd was a pioneer in talk on FM with his nationally syndicated “Innerview” program consisting of hour-long conversations with rock artists about their music and more. Read his LA Times obituary here.