J.J. Henry aced the par-3 fifth in Sunday's final round.
Henry, who had been tied for the lead prior to hitting his tee shot, briefly took a two-shot lead with the ace. But playing partner Jason Dufner ended up with birdie on the same hole to reduce the lead to one.
The hole-in-one was Henry's second of the year. He had one in the first rounf of the Puerto Rico Open presented by seepuertorico.com.
The ace was the first at the HP Byron Nelson Championship since Ken Duke aced the second hole in the second round of 2010.
Should Henry go on to win, he would be the first winner of a PGA TOUR event to have an ace in the same week since Steve Stricker at last year’s Memorial Tournament presented by Nationwide Insurance.
Jonathan Byrd was the last champion to post an ace on the final day. His ace came in a playoff to win the 2010 Justin Timberlake Shriners Hospitals for Children Open.