explained, "One of the things that's very noticeable; it's all '80s keyboards, which I can't stand. They totally date it. Thank god, I found Derek Sherinian, who — and I know he won't mind me saying this — Derek's like the illegitimate son of Jon Lord. He just played his ass off for us, and you can hear it." April 2004, Sherinian was invited by ex-Whitesnake guitarist John Sykes to play three shows in Japan with Marco Mendoza bass, Tommy Aldridge on drums. The live album John Sykes (2004) "Bad Boy Live" was from this tour. Sykes later guested on the song "God of War" with Zakk Wylde on Sherinian's (2004) "Mythology" record. Sons of Apollo In August 2017, he and Mike Portnoy joined forces to form, a progressive metal supergroup named Sons of Apollo and also featuring Billy Sheehan, vocalist Jeff Scott Soto and guitarist Ron "Bumblefoot" Thal. Sons of Apollo released their debut album Psychotic Symphony on October 21, 2017, followed by a world tour of 83 shows in 23 countries. Sons of Apollo released their second album, "MMXX", in January 2020 co-produced once again by Sherinian and Mike Portnoy. Guest live appearances Kiss On the recommendation of Eric Singer, Sherinian was hired to play off-stage keyboards on Kiss' Revenge Tour. Sherinian is on the Alive III live album and also guested with Kiss on the song "Do You Remember Rock & Roll Radio?" on the Ramones tribute album We're a Happy Family. Alice in Chains July 14, 2009, Sherinian performed a one-off acoustic gig at Ricardo Montalbán Theatre in Hollywood with Alice in Chains to launch their Black Gives Way to Blue album. Dorians September 10, 2012, Sherinian was special guest to the Armenian band Dorians performing a concert in Yerevan and the first rock concert ever in Artsakh. On September 13, 2012 Glenn Hughes and Sherinian met Bako Sahakyan, the president of de facto independent Nagorno-Karabakh Republic and organized a concert there. After his visit to Artsakh, Sherinian was placed on the Azerbaijan black list due to conflict between the two countries. Black Label Society March 6, 2013, Sherinian was a special guest keyboardist with Black Label Society for their Unblackened acoustic set at the Club Nokia in Los Angeles. The performance aired live on AXS TV, and was released in September 2013 on CD/DVD/Blu-ray formats. Zakk Wylde officially "patched" Sherinian in as president of the