premise: Fred Seibert only has a career as a rock record producer.
hypothesis: Frederick `` Fred '' Seibert ( born September 15 , 1951 ) is a serial entrepreneur and American television and film producer . Seibert has held leading positions with MTV Networks , Hanna-Barbera , and Next New Networks , and is an angel investor in several technology and media start-ups . He has produced live action and animated programs for cable television , and the internet , and began his professional career as a jazz and blues record producer .