I was not familiar with his work, but Chuck Riley was well known in the Voice Over business after a successful career as a DJ in several markets, including L.A. and NYC: Power 106 and Hot 97, respectively.
VoiceHunter.com is announcing his passing (yesterday), currently on their Home Page. Chuck helped found the site. They are featuring the best demo they have of him at http://www.voicehunter.com/Riley,Chuck.mp3