I remember when I first heard that the voice of Filmation's Robin was the same guy that did the TOP 40 show on radio. And I remember when I realized that he was also HB's Shaggy. Thus, I particularly enjoyed the SCOOBY DOO episode where Robin (and Batman) met Shaggy (and Scooby!) Hearing Casey's voice was always comforting and the added nostalgia factor as time went by made it even more to be treasured. His passing comes on the heels of a very sad and public family crisis based around him and yet his voice is, in fact, STILL on the radio...and hopefully always will be.
Rest in Peace, Casey. And thanks!