Dustin Johnson had played Colonial Country Club only once before, six years ago when he didn't even make it to the final round.

In his return to Hogan's Alley, Johnson took a one-stroke lead after the first round of the PGA Colonial in Fort Worth, Texas.

Johnson shot a bogey-free 5-under 65 on Thursday, driving a lot of 3-irons off the tees into the fairways and hitting 16 of 18 greens in regulation.

"I've got to keep doing what I'm doing," Johnson said. "I've got a pretty good game plan for the golf course off the tee. So I'm going to stick to that, just trying to keep getting birdie looks on every hole."

His only birdie on the back nine was a 2-footer at the 177-yard 16th hole. That was enough to lead after his front-side 31 that included a 45-foot birdie putt on the difficult par-4 fifth hole.

Hunter Mahan, playing in the group ahead of Johnson, led before a double-bogey 6 at the 433-yard 18th hole for a 66. He was tied for second with Harris English, Tim Wilkinson and Robert Streb.

Jimmy Walker, a three-time winner this season, and 20-year-old Dallas native Jordan Spieth were in the group of 10 players at 67.

Adam Scott, playing as the No. 1 player in the world for the first time, shot 71 after playing his first nine holes at 4-over 39.

Champions: Joe Durant birdied his final hole for a 6-under 65 and a one-stroke lead after the first round of the Senior PGA Championship in Benton Harbor, Michigan.

Making his third Champions Tour start after turning 50 on April 7, the four-time PGA Tour winner had seven birdies and a bogey at Harbor Shores.

Dan Forsman, fighting an arthritic left hip, opened with a 66, and Brad Faxon had a 67.

European PGA: Denmark's Thomas Bjorn shot a course record 10-under 62 at Wentworth to take the first-round lead in the BMW PGA Championship in Virginia Water, England.

Bjorn had an eagle and eight birdies on the West Course.

Ireland's Shane Lowry was second with a 64 in the round delayed twice because of rain.

The round was suspended because of darkness with 33 players still on the course.

Spain's Rafa Cabrera-Bello was third at 65. Rory McIlroy opened with a 68.

LPGA: Catriona Matthew took the first-round lead in the Airbus LPGA Classic, holing a bunker shot for an eagle and finishing with an 8-under 64 in Mobile, Alabama. Charley Hull had a bogey-free 65 in the afternoon. The 18-year-old English player birdied the final two holes.