Jenny Shin leads KPMG Women’s PGA Championship with bogey-free 67

South Korean Jenny Shin shot a bogey-free, seven-under-par 66 Thursday for a one-stroke lead after the opening round at the KPMG Women’s PGA Championship, the second major of the season.

Canadian teenager Brooke Henderson had a three-putt bogey on the final hole (9) to drop a shot back after Shin birdied No. 18 at the Westchester Country Club in Harrison, N.Y.

Shin had five birdies and an eagle on the par-five 15th. The 17-year-old Henderson, playing on a sponsor exemption, eagled the par-five 12th.

Hall of Famer Karrie Webb birdied three of the first four holes and finished at 68. The 40-year-old Webb, who started on the back nine, had a bogey-free round until she dropped a shot on the seventh.

Americans Brittany Lincicome, Lexi Thompson, Cristie Kerr and Stacy Lewis were in a large group that finished four strokes back at 70 in steamy temperatures that reached the mid-80s. Lincicome, the winner of the first major at the ANA Inspiration in April, eagled the par-five 15th and followed with a birdie on 16.

Two-time defending champion Inbee Park shot a 71. Top-ranked teenager Lydia Ko was another stroke back, and Suzann Pettersen, coming off a win in Canada, finished at 74.

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Ryan Palmer, Brooks Koepka and Greg Owen each shot six-under 64 for a three-way tie atop the leaderboard after the opening round of the St. Jude Classic in Memphis, Tenn.

Palmer, a three-time PGA Tour winner, turned in a bogey-free round with six birdies in the afternoon to join Koepka and Owen atop the leaderboard.

Koepka, who won in Phoenix earlier this year, matched his low round of 2015 with eight birdies and two bogeys, while Owen shot his best round this year with a bogey-free round featuring six birdies.

Scott Brown, Steven Alker and Brian Davis each shot 65s. Defending champ Ben Crane tied four others with 66s.

Boo Weekley was tied with six others at 67, and Phil Mickelson was in a group of 10 at 68.

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Bernhard Langer had four birdies on the final five holes to tie a course record with a six-under 65 in the first round of the Senior Players Championship in Belmont, Mass.

The tournament’s 2014 winner bogeyed twice but also had four birdies on the front nine.

Guy Boros, Lee Janzen, and Rocco Mediate finished the round in a three-way tie for second at four-under 67.

Boros birdied three of his final six holes. Janzen made five birdies on his first nine while Mediate opened with three birdies on his first four.

Charles Schwab Cup points leader Colin Montgomery is three shots off the lead, and tied for fifth at 3-under-par 38.