Thompson, an 11-time winner on the LPGA Tour, became just the seventh woman to play on the PGA Tour and the first in five years at the event at TPC Summerlin in Las Vegas after receiving a sponsors’ invitation to compete.
And Thompson was tied for 76th and had a 20-foot putt for par on the 17th hole when play was suspended due to darkness.
Beau Hossler holds a one-stroke lead over JT Poston and Cameron Champ after shooting an opening round of nine-under on Thursday.
Thompson will resume play one shot under the cut line, with the top 65 and ties to continue into the weekend at the end of Friday’s second round.
“I played decent,” Thompson said. “I had one bad hole and a few iffy shots.
“But it’s golf. It was kind of expected.”
Thompson, who is hoping to inspire other female golfers and has said that making the cut would be “at the top of my accomplishments”, added: “It’s been great so far this whole week. Everybody has been so welcoming and it’s just a huge honour just to be able to tee it up here.
“There’s more to it than just golf. Shriners does amazing things for these kids, so I’m happy to be out here and supporting them in any way I can.”
The one-time major winner made a strong start with a par on the first hole and then recording her first PGA Tour birdie on the par-four second. However, that was followed by a first bogey on the third.
A double-bogey at the par-four seventh and then a further bogey at the eighth set her back, but she rounded the turn with another birdie at nine.
“I knew (on No.) 9 I could get a birdie as long as I hit that fairway
