Deltha Lee O'Neal, III is an American former professional football player who was a cornerback for nine seasons in the National Football League (NFL). He played college football for the California Golden Bears, and was recognized as a consensus All-American. He was selected by the Denver Broncos as the 15th pick overall in the 2000 NFL draft, and he played professionally for the Broncos, Cincinnati Bengals and New England Patriots of the NFL. He was a two-time Pro Bowl selection.

The 2000 NFL draft was the procedure by which National Football League teams selected amateur U.S. college football players. It is officially known as the NFL Annual Player Selection Meeting. The draft was held April 15–16, 2000, at the Theater at Madison Square Garden in New York City, New York. No teams chose to claim any players in the supplemental draft that year.