The Red Devils performed two times at Red Rocks Amphitheatre, the famous Colorado open-air venue built into a rock formation. Most famous (for guys my age, at least) for an iconic performance by U2 for 1983’s “Under a Blood Red Sky,” Red Rocks hosts concerts regularly.
From the now-defunct Rocky Mountain News in Denver:
“The Blues on the Rocks series on Sept. 5 has a full circle of blues: Legends B.B. King, Koko Taylor and Buddy Guy will mix it up with young guitar slinger Eric Johnson and newcomers, the Red Devils (a band that is a favorite of Mick Jagger).” (April 16, 1993)
“Blues on the Rocks at Red Rocks (Sept. 21): B.B. King, Dr. John, Little Feat, the All-Star Tribute to Muddy Waters and the Red Devils heat up the rocks starting at 6 p.m. Tickets are $22.50 at TicketMaster, Sound Warehouse and other locations.” (May 22, 1994)
Notable is that, if the timeline holds up, the Sept. 5, 1993, date was one day before the band recorded its session with Johnny Cash and for its second album.