Janie Hendrix, CEO of Experience Hendrix, LLC commented, "We're all devastated to hear of Mitch's passing. He was a wonderful man, a brilliant musician and a true friend. His role in shaping the sound of the Jimi Hendrix Experience cannot be underestimated. Over the course of the recent tour, he seemed delighted with the interchange with the other musicians and the audiences. There is no question that he was doing what he loved."

Mitchell began working with Experience Hendrix, the family owned company established by James "Al" Hendrix shortly after its inception. He had been featured in many of the documentaries and programs issued by the company over the years.
Before signing on as the drummer with the Jimi Hendrix Experience, Mitchell had built a reputation through his work with The Pretty Things, Georgie Fame & The Blue Flames and had been one of the top session drummers of the time starting at the age of 14. His drumming technique was an amalgam of rock and jazz styles as he was heavily influenced by the likes of Elvin Jones and Max Roach. He joined the Jimi Hendrix Experience in 1966 and performed with Hendrix and bassist Noel Redding at their US debut at the Monterey Pop Festival in June of 1967. He was also, most notably, part of the later version of the Jimi Hendrix Experience that included Billy Cox who performed the closing set of the Woodstock Festival on August 18, 1969. Following the death of Jimi Hendrix in 1970, Mitchell worked with producer Eddie Kramer in completing work on both The Cry of Love and Rainbow Bridge albums.

Prior to his music career, Mitchell was a noted child actor who starred in the TV series Jennings At School as well as numerous feature films. After falling in love with American jazz, blues and rock 'n' roll, he abandoned acting and devoted the rest of his life to music.