Craig Gruber (June 22, 1951 – May 5, 2015) was an American rock bassist and musician. He was best known as the original bassist in the English band band Rainbow. He also played in Elf with vocalist Ronnie James Dio, keyboardist Mickey Lee Soule, drummer Gary Driscoll and guitarist David Feinstein.
- Stef Lach (May 6, 2015). "Rainbow bassist Craig Gruber dead at 63". ClassicRock.com. Retrieved May 10, 2015.