William (Rosko) Mercer
William Roscoe Mercer, better known to millions of radio listeners simply as Rosko, was an American news announcer and disc jockey. He is best known for his stints on New York's WOR-FM and WNEW-FM in the 1960s. In 1965, he was a DJ on KBLA in Burbank, California. Rosko and other DJs of the time pioneered alternative-format FM radio, in response to the restrictive playlist programming of Top 40 AM stations.
Mercer died of cancer on August 1, 2000.
