David Robert Duval (born November 9, 1971) is an American professional golfer and former World No. 1 who competes on the PGA Tour.
Duval was born in Jacksonville, Florida, the son of golf instructor and club professional Bob Duval and Diane Poole Duval, a member of the FSU Flying High Circus during college. His brother Brent was two years older, and sister Diedre was five years younger. During his early years, his father was club professional at Timuquana Country Club, where he learned to play golf under his father's guidance.
When David was nine, his brother Brent developed aplastic anemia. The family sought treatment at Rainbow Babies & Children's Hospital in Cleveland, Ohio, where David underwent surgery to donate bone marrow. Unfortunately, the transplant was not successful, and Brent died as a result of blood poisoning on May 17, 1981 at age 12.