Claim: Regarding the production of Surrealistic Pillow, Jorma Kaukonen opined that Jerry Garcia was essentially the producer but did not play on "J.P.P. McStep B. Blues."
Evidence: Jerry Garcia – "spiritual advisor"; guitar on "Today", "Comin' Back to Me", "Plastic Fantastic Lover", "In the Morning", and "J. P. P. McStep B. Blues"