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Rory McIlroy blasted his driver over trees and into fairways, setting up some of his seven birdies that carried him to a 5-under 65 and a one-stroke lead through one round of the PGA Championship at Southern Hills in Tulsa. This was McIlroy’s lowest start to par since a 5-under 66 when he won the PGA at Valhalla in 2014, the last of his four majors. Will Zalatoris and Tom Hoge are at 4 under, one shot ahead of Matt Kuchar, Justin Thomas and Abraham Ancer .