Alan Freed
Alan Freed (December 15, 1922 - January 20, 1965) was a United States DJ, best known today for the payola scandal that ended his career and revolutionized the radio industry.Freed is often credited with coining the phrase "rock and roll", which is demonstrably false. Freed, however, did much to help popularize the term.
Freed is credited with producing the first rock and roll concert on March 21, 1952 in Cleveland, Ohio.