LAS VEGAS — Canada's David Hearn birdied his final three holes in perfect morning conditions for 7-under 64 and a share of the lead Thursday in the PGA Tour's Shriners Hospitals for Children Open.
Michael Thompson, Mark Hubbard and Tyler Aldridge also topped the leaderboard at TPC Summerlin. Aldridge had two holes left when first-round play was suspended because of darkness.
Hearn had eight birdies and a bogey.
"The course was playing pretty much perfect as it's going to get," Hearn said. "The greens were great this morning. I think that there's a reason there's a lot of good scores on that board. It's because the course is in such good shape."
Patrick Rodgers, Patton Kizzire, Chad Campbell, Ryan Palmer, Ricky Barnes, D.H. Lee, Ryo Ishikawa, Greg Owen, Shane Bertsch and Brendon Todd shot 65, and Henrik Norlander also was 6 under with two holes left.
Lee birdied six of his first seven holes, then bogeyed the next two.
Kizzire is making his first start as a PGA Tour member after winning twice last year on the Web.com Tour and topping the regular-season and finals-combined money lists. He was married Saturday.
Jimmy Walker opened with 66, and U.S. Presidents Cup teammate Rickie Fowler had 72.
Thompson and Hubbard eagled the par-5 16th, with Hubbard holing 30-foot putt and Thompson a 25-footer in their morning rounds. Thompson also had seven birdies and a double bogey.
"It definitely helps when there's no wind and real calm and sunny," Thompson said. "The only thing that we really have to consider is the cold in the morning. It helps when the greens are a little bit receptive and they're rolling perfect."
Hubbard had the eagle, six birdies and a bogey. He played a three-hole stretch in 4 under with birdies on Nos. 14 and 15 and the eagle on 16, but bogeyed the 17th and closed with a par.
"I've kind of just taken a little bit of a chill pill recently, and I'm playing a lot better golf," Hubbard said.
He got into the field as an alternate when Matt Every withdrew. "It's a nice opportunity to have," Hubbard said.
LPGA: Ji Eun-hee shot 6-under 66 in windy conditions to take a one-stroke lead in the Taiwan Championship at Tapei.
The South Korean, 29, birdied five of her final seven holes at Miramar. Ji won the 2008 LPGA Championship and 2009 U.S. Women's Open, both majors, for her lone LPGA Tour titles.
Lin Xi-yu was second. American Morgan Pressel, Charley Hull, Sandra Gal and Sun Young Yoo shot 68. Pressel birdied the final two holes.
"I didn't put myself in a whole lot of trouble," Pressel said. "I was a little upset with my one bogey, because it was just a club error, a mistake, not a poor shot or anything like that. It was a tough wind to judge which clubs to hit on certain holes, and some of the holes are cross-wind and that makes it challenging — slightly hurting, slightly helping."
Brittany Lincicome of Seminole (69) was in a group that included second-ranked Lydia Ko and Lizette Salas.
Third-ranked Stacy Lewis shot 77, her worst score since 78 in the final round of the 2013 U.S. Women's Open.