Louis William Marini Jr., known as "Blue Lou" Marini, is an American saxophonist, arranger, and composer. He is best known for his work in jazz, rock, blues, and soul music, as well as his association with The Blues Brothers.

Briefcase Full of Blues is the debut album by the Blues Brothers, released on November 28, 1978, by Atlantic Records. It was recorded live on September 9, 1978, at the Universal Amphitheatre in Los Angeles, when the band opened for comedian Steve Martin. The album consists of covers of blues and soul songs from the 1950s to 1970s.