This 1967 single has saxophonist King Curtis recording under the name of his band, the Kingpins. In the Pocket is the "B" side of yet another cover of Ode to Billie Joe, which actually was a moderate hit for Curtis under the Kingpins name. Apparently some pressings of the single give Curtis top billing, probably after Ode to Billie Joe got a fair amount of airplay.
In the Pocket was one of the few originals recorded at a session on Aug. 24, 1967, at American Studios in Memphis. It's a real "B" side gem. Listen to the MP3 taken from the original Atco single.
In the Pocket
In the Pocket has turned up on several King Curtis compilations and re-releases in the digital age, both on CD and as a download. On CD the one to go for is Instant Soul: The Legendary King Curtis from the well-regarded Razor & Tie label. You can get a used copy on Amazon for about $11.
The "A side of the single sounds like this.