Frederick Below Jr. was an American blues drummer who worked with Little Walter and Chess Records in the 1950s. According to Tony Russell, Below was a creator of much of the rhythmic structure of Chicago blues, especially its backbeat. He was the drummer on Chuck Berry's song "Johnny B. Goode". He also recorded with J. B. Lenoir.

Marion Walter Jacobs, known as Little Walter, was an American blues musician, singer, and songwriter, whose revolutionary approach to the harmonica had a strong impact on succeeding generations, earning him comparisons to such seminal artists as Django Reinhardt, Charlie Parker and Jimi Hendrix. His virtuosity and musical innovations fundamentally altered many listeners' expectations of what was possible on blues harmonica. He was inducted into The Rock and Roll Hall of Fame in 2008, the first and, to date, only artist to be inducted specifically as a harmonica player.