Keltner is well known for his session work on solo recordings by three members of The Beatles, working with George Harrison, John Lennon (including Lennon solo albums, as well as albums released both by the Plastic Ono Band and Yoko Ono), and Ringo Starr [REF].
In 1974 Keltner played on the Lennon-produced Nilsson album Pussy Cats alongside Ringo (and Keith Moon) on "Rock Around the Clock".