PGA Tour: Stenson, Johnson trail by one

Swede Henrik Stenson, seeking his first PGA Tour victory since the Tour Championship in 2013, shot a six-under par 66 in the third round of the Shell Houston Open at the Golf Club of Houston on Saturday, the lowest score of the day.

At 10-under, Stenson is tied for third place with Dustin Johnson and Russell Henley, all of whom trail co-leaders Jim Herman and Jamie Lovemark by one stroke. Stenson's round included seven birdies and a 42-foot putt from off the green on 18 to save par.

Johnson, who is looking to extend his streak of winning tournaments in eight consecutive years, shot a two-under par 70, a round that featured three birdies and an eagle.

Reigning PGA Tour Player of the Year Jordan Spieth shot a two-under 70 to get to six-under. He is tied for 14th, five strokes behind.

"I'm losing a couple strokes back to the field on putting and normally we're gaining strokes," said Spieth. "Inside 10 feet I've got to be solid and confident. I can't get into a rhythm. I'm stepping off putts. That's a tough feeling. It kind of bleeds into the rest of your game, too, because you feel like you've got to be more aggressive. So, it really comes down to the putter for me. I have to get better before next week."

Phil Mickelson started his round with three birdies on the first five holes, but triple bogeyed the sixth. He finished his round at one-under 71, moving to a tie for 19th at five-under.