The Vardon Trophy is awarded by the PGA of America to the PGA Tour's leader in scoring average. When the award was first given in 1937, it was awarded on the basis of a points system. No award was given from 1942–1946 due to World War II. In 1947, the PGA began awarding it for low scoring average. In 1988, the trophy began going to the golfer with the lowest adjusted scoring average over a minimum of 60 rounds, with no mid-round withdrawals (instituted in 1988).