Langer has already won back-to-back majors at the Senior British Open and U.S. Senior Open.
Nick Price (67) notched an eagle on the par-five 18th at TPC Snoqualmie Ridge, and ended up one back at minus-14.
Tom Pernice Jr. (70) held sole possession of second place four strokes further back at minus-10.
Keith Fergus (67) and Hal Sutton (72) were tied for fourth at 6-under 138.
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