Quoted from mof:I'd love to see some "internet evidence" that it was him. It sure sounds like Ken.
At a seminar with Kevin O'Connor at Pinball Expo 2007 Medusa designer Wally Welch stated that the guy that did the voices for Medusa also did the voice for Hubert the Harris Lion in the Harris Bank commercials years ago.
http://www.pinballnews.com/shows/expo2007/index4.html
The Hubert voice was done by comedic actor Frank Nelson.