I don't recall what year the Caser left "Cube" but he spent at least 3 years in Los Angeles (Pasadena) at KRLA 1110 between 1967 and AT40. He was initially mid-morning on weekdays, then became the fill-in and weekend jock. His Sunday afternoon program was the predecessor to AT40, minus the formatics. But he did the count-down and told his "touching" stories, only he used Cashbox magazine. The change to Billboard was with AT40.When AT40 premiered, KRLA ran it in the LA market in his old Sunday time slot.
The story of how Casey got his signature style - possibly apocryphal: At KEWB, he tried to be the typical Top 40 jock jokester and attempted to be humorous between songs. Apparently, a KEWB manager didn't think he was funny, and told him to knock it off. Depressed, and not knowing how to fill airtime, Casey was walking the halls at the station, and discovered a teen-fan magazine thrown away in a trash can. He read the mag, and developed his style from the articles therein. At least, that's the story...