Bill Haas won the 2013 AT&T National, his fourth PGA Tour victory in as many years, but the big story on Sunday may have been D.H. Lee, who had the best round in the entire field.
Lee was an afterthought going into Sunday after a forgettable 4-over 75 in the third round. He caught fire in the final round, however, sinking six birdie putts on the front nine alone, including five in a row. He cooled off at the turn, getting two bogeys on holes 10 and 11, but he recovered to finish strong, getting three more birdies on the back nine. Lee entered the clubhouse with a 7-under 64, the best score on Sunday, and finished in a tie for third place.
Elsewhere, Roberto Castro finished in second after a 2-under 69. He entered the day in first place, but Haas shot 66 to get a comfortable three-stroke win.
Here's the final Top 10 leaderboard.