Complex sentence: Grizzard was one host of a nightly series of four programs on the station; he shared the block of programs with "John R." (Richbourg), Bill "Hoss" Allen, and Gene Nobles.
Split into simpler sentences: Grizzard was one host of a nightly series of four programs on the station. He shared the block of programs with "John R." (Richbourg), Bill "Hoss" Allen, and Gene Nobles.