Drums, Congas, Drums [Clap Drums], Percussion – Don Alias
Electric Bass, Electric Upright Bass – Gene Perla
Electric Piano, Gong [Chinese Gong] – Jan Hammer
Electric Upright Bass – Eddie Gomez (tracks: B1, B3)
Engineer – Edwin H. Kramer
Executive Producer – Sonny Lester
Flute, Flute [Alto, Bass], Piccolo Flute [Alto] – Jeremy Steig
Photography – Berry Berenson
This version of "Fusion" is essentially an enhanced version of Energy, released in 1971 by Capitol. Disc one is the original album, while disc two consists of out-takes from the same sessions. The labels on both discs show only the words "Jeremy Steig", omitting both titles. Oddly, the labels on the discs differ: disc one has "Groove Merchant" in large multi-coloured letters, while disc two only shows the Groove Merchant logo. The Japanese version of Fusion includes only disc two (the out-takes), as do the Spanish and Italian versions, under different titles.
"Portions of this album were previously released on Capitol Records."