http://www.youtube.com/watch?v=wXKhwjlGAH4 I'm more familiar with Johnny Winter's late 80's/early 90's albums although I'm old enough to have seen this 1979 video... so how is it I don't know this bassist? No credits but sounds like Johnny calls him "John Parrish" at around the 26:00 mark. If that's who it is, he's also known as John Persh and played bass with Rare Earth...and died two years after this video! What a tone, he really digs into those strings and keeps things interesting for 1/4/5 blues progressions with cool lines and the occasional chord. He switches to a pick for the second song! And later plays blues harp while playing bass!