William James "Willie" Dixon was an American blues musician, vocalist, songwriter, arranger and record producer. A Grammy Award winner who was proficient on both the Upright bass and the guitar, as well as his own singing voice, Dixon is arguably best known as one of the most prolific songwriters of his time. Dixon is recognized as one of the founders of the Chicago blues sound. A man of considerable stature, at 6 and a half feet and weighing over 250 pounds, he took up boxing; he was so successful that he won the Illinois State Golden Gloves Heavyweight Championship (Novice Division) in 1937. Dixon turned professional as a boxer and worked briefly as Joe Louis' sparring partner.