Credits

Phil Upchurch: Bass
Muddy Waters: Guitar, Vocals
Earl Hooker: Guitar
James Cotton: Harmonica
Sam Lay: Drums
Buddy Guy: Guitar
Otis Spann: Piano
Willie Dixon: Producer
Little Walter: Harmonica
Junior Wells: Harmonica
Lafayette Leake: Piano
A.C. Reed: Tenor Saxophone
Jimmy Rogers: Guitar
Luther Tucker: Guitar
Sunnyland Slim: Piano
Leroy Foster: Guitar
Pat Hare: Guitar
Fred Below: Drums
Vartan : Artwork Direction
Andy McKaie: Producer, Reissue Compilation
Francis Clay: Drums
Mike Fink: Design
Beth Stempel: Production Coordination
Mary Katherine Aldin: Liner Notes
Leonard Chess: Producer, Bass Drums
Norman Dayron: Producer
Andrew Stephenson: Bass
Clifton James: Drums
Elgin Evans: Drums
Jeffrey M. Carp: Harmonica
Fred Robinson: Guitar