SAMMAMISH, Wash. (AP) - Brooke Henderson beat top-ranked Lydia Ko with a birdie on the first hole of a playoff Sunday in the KPMG Women's PGA Championship after overcoming a three-shot deficit on the back nine.The 18-year-old Canadian, ranked No. 4 in the world, closed with a bogey-free 6-under 65 - the best round of the week at Sahalee - to match Ko at 6-under 278.