Jack Bruce found international fame as the bass player for Cream.
With Eric Clapton & Ginger Baker.
I do have to say, howeer, that the only album that I have that features Jack Bruce is Zappa's "Apostrophe (')". And that's just on one track.
Jack Bruce met, and jammed, with Frank Zappa due to mutual friend Jim Gordon.
The jam took place in September, 1972, at Electric Ladyland Studios, NYC with Frank
Zappa, Jack Bruce, Tony Duran (rhythm guitar), and Jim Gordon (drums). The result of this
jam can be found on the title song on Apostrophe (').
Forty years later, Jack Bruce is still playing and recording. His latest album is called "Jack Bruce & His Big Blues Band : Live 2012" and it's a 2CD set.