Walker yet another surprise at the top

Jimmy Walker matched his low score in a major with a 5-under 65 to lead the first round of the PGA Championship in Springfield, N.J., one shot ahead of Martin Kaymer.

British Open winner Henrik Stenson, trying to join Ben Hogan in 1953 as the only players to win consecutive majors at age 40, is two shots behind.

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ANDY LYONS/GETTY IMAGES Jimmy Walker, at 5-under 65, leads a major for the first time in his career.