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Brooke Henderson could become the third player in LPGA history to win a tour event before turning 18, after opening a five-stroke lead at the Cambria Portland Classic on Saturday.
The 17-year-old Canadian moved to the verge of a rare accomplishment when she fired a bogey-free seven-under 65 in the third round at Columbia Edgewater Country Club in Oregon.
She was at 18-under 198 with one round left, while American Morgan Pressel also shot 65 to move into second place on 13-under.