“It’s always nice to finish like that,” he said. “This tournament’s always kind of a birdie fest, so birdies and eagles help a lot.”
The 22-year-old, who won the Texas Open in April for his second PGA Tour title, was six-under over his last six holes in the first round, coming in off a tie for fifth in last week’s Travelers Championship in Connecticut.
Further north in Michigan at the Dow Championship team’s event in Midland, Ko and playing partner Danielle Kang (USA) finished with a one-over-par 71 to end the day in a tie for 43rd.
The pair were left to rue a double bogey on the par-four eighth, with four birdies in the round cancelling out the shots they dropped with bogeys on the second, fourth, and 17th holes.
They will start their second round on the wrong side of the cut line, which is projected to be one-under.
Ruoning Yin (China) and Atthaya Thitikul (Thailand), Jaravee Boonchant and Chanettee Wannasaen (Thailand), and Ally Ewing and Jennifer Kupcho (USA) shared the round-one lead at six-under-par.
The tournament is the only official team event on the LPGA Tour schedule.
- With AP