Ric Grech
Prior to Blind Faith, he was the bassist/violinist in Family, one of the best bands you've never heard. Another famous bassist in Family was John Wetton.
Anyway, Ric then landed with Blind Faith, fairly late in the project. I read that producer Jimmy Miller said that Jack Bruce played bass on most of the Blind Faith tracks. According to the Blind Faith deluxe set liner notes, Grech did not come on board until after "Presence Of The Lord," "Well All Right," and some others had been recorded, so this may be true. Grech obviously played violin on "Sea Of Joy," though.
When Blind Faith imploded, Grech initially joined Winwood and Baker in Ginger Baker's Air Force, which also included Traffic's Chris Wood, ex-Moody Blue and future Wing Denny Laine, Graham Bond, and about 100 others.
After one album with them, Grech joined the reformed Traffic. Grech co-wrote their hit "Rock and Roll Stew" on the Low Spark album & also played on Welcome To The Canteen with Dave Mason rejoining Traffic for awhile, just long enough for a LIVE album & tour. I saw him several times with Traffic--on the Low Spark tour & Canteen tour, cuz they were my fav band at that time. He also played bass at Eric Clapton's Rainbow Concert.
After leaving Traffic, Grech joined yet another ill-fated supergroup in 1975: KGB. Besides himself, this group featured another supergroup veteran, Carmine Appice, with Mike Bloomfield on guitar, and some other session vets. They are said to have sucked. I never got to hear 'em. Bloomfield and Grech left after one album.
Grech also played with Gram Parsons on G.P..
Grech died of liver cancer (or some sort of liver disease) in 1990 or so.
Wikipedia bio:
http://en.wikipedia.org/wiki/Ric_Grech