John Robert "Johnny Hammond" Smith was an American soul jazz and hard bop organist. Born in Louisville, Kentucky, he was a renowned player of the Hammond B-3 organ so earning "Hammond" as a nickname, which also avoided his being confused with jazz guitarist Johnny Smith though this could lead to him being confused with Jimmy Smith (musician), another Hammond great.

Bernard Lee "Pretty" Purdie is an American drummer, and an influential R&B, soul and funk musician. He is known for his precise musical time-keeping and his signature use of triplets against a half-time backbeat: the "Purdie Shuffle." He was inducted into the Modern Drummer Hall of Fame in 2013.