Ricky Barnes birdied six of the last eight holes Thursday at rain-softened TPC Louisiana to take a one-stroke lead in the Zurich Classic in Avondale.
He finished the opening round with an eagle, seven birdies and a bogey for an 8-under 64.
"Today it was nice because it was a pretty stress-free round," said Barnes, who didn't arrive in New Orleans until Wednesday after the birth of his daughter Monday night.
Barnes, who's missed the cuts in seven of his last eight events, eagled the par-5 second hole, hitting a 3-wood from 294 yards to 12 feet.
Boo Weekley and Lucas Glover were a stroke back, and D.A. Points and Morgan Hoffmann shot 66.
Guan Tianlang, the 14-year-old Chinese amateur playing on a sponsor exemption, opened with an even-par 72, highlighted by a 5-wood that he hit to a foot on the par-3 17th.
"I think I played pretty good golf," Tianlang said. "Not the best, but I made some ups and downs and a couple birdies."
Guan tied for 58th in the Masters after becoming the youngest player to make the cut at Augusta National (Ga.), and said Thursday that he'll play in a U.S. Open qualifier in two weeks in Dallas.
Defending champion Jason Duffner shot 70, and 2011 winner Bubba Watson had a 73.
LPGA Tour: Rookie Caroline Masson shot a 7-under 64 for a two-stroke lead over Carlota Ciganda at the inaugural North Texas LPGA Shootout in Irving.
Masson, who competed on the Ladies European Tour for three seasons and won the 2012 South African Women's Open, closed out her bogey-free round with an 18-foot birdie putt on the ninth hole at Las Colinas.
Inbee Park, the No. 1 women's player in the world, was among five players at 67.
Taylor Coleman, a 16-year-old high school sophomore from San Antonio, shot 68.
"The first tee shot was really scary. My foot slipped, and I was shaking so bad," said Coleman, who still managed an opening bogey.