Updated

Justin Thomas of Goshen, Ky., set a course record with a 7-under 65 and leads the 35th Junior PGA Championship by one stroke.

Thomas' opening round Monday included an eagle, seven birdies and two bogeys on the 7,255-yard Jack Nicklaus-designed Sycamore Hills course, which hosted the event for the first time.

Thomas is one stroke in front of fellow 17-year-old Oliver Schniederjans, of Powder Springs, Ga. Seven players are five strokes back.

Mariah Stackhouse, 16, of Riverdale, Ga., and Kyle Roig, 17, of Puerto Rico, lead the girls side with 2-under 70s on the 6,395-yard setup. Two players were at 71.

The field will be cut to the low 30 and ties after 54 holes.