John Francis "Jaco" Pastorius III was an American jazz bassist, composer, and producer. Widely regarded as one of the greatest and most influential bassists of all time, Pastorius recorded albums as a solo artist, band leader, and as a member of the jazz fusion group Weather Report from 1976 to 1981. He also collaborated with numerous artists, including Pat Metheny and Joni Mitchell.

Jazz fusion is a popular music genre that developed in the late 1960s when musicians combined jazz harmony and improvisation with rock music, funk, and rhythm and blues. Electric guitars, amplifiers, and keyboards that were popular in rock and roll started to be used by jazz musicians, particularly those who had grown up listening to rock and roll.