PITTSFORD, N.Y. — Not a late band of rain, a soggy course, nor those pesky orange flags could deter Chella Choi. Not with her father on the bag.

The 22-year-old South Korean, who has never won on the LPGA Tour, shot a 5-under 67 on Friday to take a one-shot lead over Morgan Pressel after the first round of the rain-delayed LPGA Championship.

Brittany Lincicome and Jiyai Shin were tied for third at 69, while Jessica Korda and Se Ri Pak were tied for fifth, another stroke back. Defending champion Shanshan Feng of China had a 2-over 74 as only 14 players broke par in the second major of the year.

Playing in the afternoon long after Pressel had shot 68 to gain the early lead, Choi surged up the leaderboard with a flawless performance on the front nine at rain-soaked Locust Hill Country Club. She made five birdies and no bogeys on her opening nine, averting most of the trouble that lurked at every hole of the waterlogged layout by hitting all 14 fairways and reaching 15 greens in regulation.

“I had a really good driver today,” said Choi, whose 54-year-old father, Ji Yeon, has vowed to serve as her caddie until she gets that first victory. “My goal was to hit the fairways.”

Also on Friday:

English up two at St. Jude: MEMPHIS, Tenn. — Harris English shot a 6-under 64 to open a two-stroke lead in the St. Jude Classic, the final event before the U.S. Open next week at Merion. Shawn Stefani was second after a 65. Paul Haley II and Scott Stallings each shot 68 to reach 5 under. Davis Love III was tied with four others at 4 under after a 70, and defending champion Dustin Johnson also had a 70 to finish at 3 under.

Waldorf leads Tradition: BIRMINGHAM, Ala. — Duffy Waldorf shot a 4-under 68 to take a one-stroke lead over Jeff Sluman after the soggy, weather-delayed second round of the Regions Tradition, the second of five Champions Tour majors. Sluman, the first-round leader, had a 71. Fred Couples, Mark Calcavecchia, Michael Allen and Rod Spittle were three strokes back.

Dutchman shoots 68 for Lyoness lead: ATZENBRUGG, Austria — Dutchman Joost Luiten shot a 4-under 68 to take a one-stroke lead at 11-under 133 after the second round of the Lyoness Open. Scotland’s Callum Macaulay, England’s Paul Waring and Spain’s Eduardo de la Riva were tied for second. Macaulay had a 66, Waring shot 67, and de la Riva had a 69.