John Underwood

Discografía como invitado / sesionista.

• The Beatles (The White Album) (1968) . The Beatles
• Sgt. Pepper's Lonely Hearts Club Band (1967) . The Beatles
• Revolver (1966) . The Beatles

Colaboraciones en canciones:

• Eleanor Rigby . Revolver . The Beatles
• She's Leaving Home . Sgt. Pepper's Lonely Hearts Club Band . The Beatles
• Don't Pass Me By . The Beatles (The White Album) . The Beatles