Blood: James "Blood" Ulmer- Blues Allnight

Wikipedia

James "Blood" Ulmer (bis an American jazz and blues guitarist and singer. Ulmer's distinctive guitar sound has been described as "jagged" and "stinging." His singing has been called "raggedly soulful."

A comprehensive bio at jazz.com

An early lesson that Benson taught Ulmer was to use his thumb to strum and pick notes in the style of guitarist Wes Montgomery.This approach helped Ulmer expand the range of sounds he was able to produce on the guitar. James showcased this new technique in performances with organ-based combos led by Jimmy Smith and Richard Groove Holmes. During this time, he was given the nickname Youngblood, which was then abbreviated to Blood.