Beau Hossler set the pace by matching his career low on the PGA Tour with a nine-under 62, which included a tee shot that found the water left of the par-3 17th at the TPC Summerlin on Thursday.

Cam Davis was the best placed Australia in a tie for 11th after shooting a four-under 67.

Thompson was the main attraction of the FedExCup Fall event, the seventh woman to play on the PGA Tour and the first in five years.

She was one-over-par for her round through 16 holes and chose to mark her ball – a 20-foot par putt on the 17th – and return to finish the first round in the morning.

The 28-year-old is still a chance of making the cut, though it was hard work to keep her score around par.

"I played decent," Thompson said.

"I had one bad hole and a few iffy shots. But it's golf; it was kind of expected."

She took advantage on two of the par-5s for birdie and got a bonus with a birdie putt from inside 25 feet on the second hole that put her in red numbers. But through 17 holes, she had only five chances inside 20 feet.

When play was suspended by darkness, she was in a tie for 76th.

Thompson wound up getting the good end of the draw even though she played late.

The start of the round was met by strong wind and chilly temperatures. The air warmed and the wind died for the afternoon, making TPC Summerlin a little more manageable.

J.T. Poston had a 63 in the morning in the tougher conditions.

Hossler, who also had a 62 in the final round of the 3M Open this year, looked particularly sharp in the afternoon. He missed only two greens and took advantage of the chances he had.

"I had one bad hole and a few iffy shots. But it's golf; it was kind of expected." – Lexi Thompson.

"Every part of my game felt good," Hossler said.

"To shoot that low you've got to have looks. Some fairly stress-free birdies is nice."

Cameron Champ had a 63 in the afternoon, while Davis Thompson and Lanto Griffin were at 64. Ten players were at 66 or better on a course where scores typically are low.

That adds to Lexi Thompson's challenge in the morning, when she has a putt on the 17th green, plays the 18th hole and then starts her second round.

In the last 70 years, Michelle Wie West was the closest to making the cut among women who have played the PGA Tour.

She missed by one at the Sony Open in 2004 when she was 14 and a freshman in high school.