Johnson needed only eight putts for a 31 on the front nine, though some of those putts were just to save par since he hit just three of those greens in regulation.
"Today was a battle as far as my ball-striking. With the exception one lucky shot on 15, I didn't put myself in terrible position," Johnson said. "I just scored. I think Dufner played better than I did, but I scored."
Divots: Masters runner-up Louis Oosthuizen opened his third round with four consecutive birdies. He was in a group of seven players tied for seventh, but 11 strokes behind Dufner. .. That group at 206 includes Kelly Kraft, the 2011 U.S. Amateur who turned pro after the Masters. The former SMU player was 6 under through his first eight holes and played even the rest of the round. ... Vijay Singh, who got the last of his 34 PGA Tour wins four years ago, was 4 under through six holes Saturday. He had four consecutive bogeys on the back nine.
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