On April 27, 1965 the careers of Morgan, Steele and programmer Ron Jacobs would gain superstar status almost overnight when they joined the staff of KHJ-AM, Los Angeles. Programming genius Bill Drake along with a staff of talented DJs called "Boss Jocks" had transformed a sleepy giant into the city's most dominant radio station. It was here that Morgan enjoyed his greatest on-air success as one of the original "Boss Jocks" on 93/KHJ which dominated the Top 40 radio market in Southern California from 1965 to 1973. Morgan's signature slogans, "Good Morgan Boss Angeles!" and "Arise and Morganize" would become familiar to his devoted morning drive time audience until the end of his career. It was also Morgan that voiced many of the "Boss Radio/93 KHJ station promos and imagery. It was also during this time that Morgan co-produced and narrated the 48-hour "History of Rock and Roll" in 1969, a definitive on-air encyclopedia of Rock & Roll. It was the first-ever "rock-umentary" aired worldwide as a definitive history of the Rock & Roll genre—a "rockumentary," as producers Drake and Gene Chenault would call it—that would stretch from the early 1950s to 1989.