In accordance with his stage name, he frequently punctuated his broadcasts with howls, which, along with his gravelly voice, made him instantly recognizable. This style was modelled, at least in part, on bluesman Howlin' Wolf.
He became internationally known in 1973 by appearing in the George Lucas film American Graffiti. His broadcasts tie the film together and catching a glimpse of the mysterious Wolfman is a part of the plot.
Afterwards, he appeared in several films and television shows (including Midnight Special and his own show, The Wolfman Jack Show). He also furnished his voice in the 1974 Guess Who's tribute, the top 40 hit single, "Clap for the Wolfman".