One Mint Julep (With Poncho Sanchez, Billy Preston)

Album3: Poncho Sanchez, Out Of Sight, Concord SACD-1031-6, 9 September 2003.

That’s Ray giving some occasional groans (he’s not credited for the piano part, but may well be playing a few notes here), and it sure is Billy Preston on the Hammond B-3.
With Pancho Sanchez, David Torres, Tony Banda, George Ortiz, Sal Vasquez, Serofin Aguilar, Scott Martin, Francisco Torres, Dale Spauding, Francisco Aguabella. Also playing: Pee Wee Ellis and Fred Wesley!

Looking at this EPK for the album, it seems safe to conclude that Ray added his dub at RPM International in LA: