While many of the low scores Thursday at the HP Byron Nelson Championship came from the morning wave, Peter Hanson battled afternoon breezes to snag the lead. Here's how things look after one round in Dallas, where Hanson leads by one over a suddenly resurgent David Duval:
What it means: Leishman held the top spot for much of the day before Hanson caught and passed him with a birdie on his final hole. The story of the afternoon wave was Duval, though, who carded his lowest round on the PGA Tour since 2011.
Round of the day: Hanson withdrew after an opening 80 at the Wells Fargo Championship in his most recent start, but showed no signs of injury during a 5-under 65 at TPC Four Seasons. Hanson birdied three of his first five holes and made the turn in 30 before recording his lone bogey of the day at No. 14. He rolled in a six-foot birdie on No. 18 to once again grab sole possession of the lead.
Best of the rest: Duval has played sparingly this season, relying largely on sponsor exemptions for starts, but appears eager to make the most of things this week in Dallas. The veteran was in the middle of the pack before ending his round with a flurry, carding four birdies across his final five holes on Nos. 5-9 to shoot a 4-under 66. He sits just one shot back as he looks to win for the first time since the 2001 Open Championship.
Biggest disappointment: It looks like there won't be back-to-back wins in Dallas for Sang-Moon Bae. The South Korean was a surprise winner here last year but after four rounds in the 60s in 2013, he opened his week with a 3-over 73. Bae made five birdies, but they were more than erased by six bogeys and a double bogey. He'll now need a strong effort in the second round to make get on the right side of the cut line.
Main storyline heading into Friday: Hanson is hardly a no-name leader, but the biggest story right now is the man in second. Duval tied for 25th at the Zurich Classic in his most recent start, but at No. 890 in the world few if any expected him to contend this week. After reaching the pinnacle of the game, he has since gone through well-documented valleys and a return to form, however brief, would make him a player to watch as long as he contends.