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- Sun Ra (occasionally)
- Mike Ratledge of Soft Machine used a Hammond (among other keyboards) on Volume Two (it is not his main keyboard)
- Dizzy Reed (Guns N' Roses)
- Melvin Rhyne
- Doug Riley (1993–2000) known as "Doctor Music". Jazz Organist of the Year.
- Terry Riley
- Laza Ristovski (organist from Serbia, played in Smak and Bijelo Dugme)
- Billy Ritchie, British, played in 1-2-3 and Clouds
- Freddie Roach
- Tony Rogers current Hammond/keyboard player with The Charlatans
- Gregg Rolie (Santana, Journey)
- Matt Rollings
- Phil Ryan played with Man, Pete Brown and others
Read more about this topic: List Of Hammond Organ Players