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Golf roundup: Only 4 under par at Cadillac

Dustin Johnson hit his tee shot on No. 7 during the second round of the Cadillac Championship.

Mike Ehrmann/Getty Images

Dustin Johnson hit his tee shot on No. 7 during the second round of the Cadillac Championship.

Matt Kuchar played out of the rough to tap-in range for birdie on the 18th hole for a 2-over 74 Friday that allowed him to join an exclusive group at the Cadillac Championship in Doral, Fla. — one of only four survivors to par.

The Blue Monster gobbled up just about everyone else.

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Dustin Johnson bogeyed three of his last six holes for a 74. Patrick Reed made only two birdies in his round of 75. Hunter Mahan atoned for a triple bogey with a 4-iron into 5 feet for eagle on the eighth hole, giving him a 74. They joined Kuchar atop the leaderboard at 1-under 143.

‘‘I felt stressed all day, because I knew every shot had ‘big penalty’ written all over it,’’ Mahan said. ‘‘It was a really tough day. There wasn’t an easy shot out there. One of those rounds where it could go south pretty fast, so you've got to grind it out and find a way to get a number up there and get to the weekend.’’

Three players broke par in the second round. No one shot in the 60s. The average score was a fraction under 76.

‘‘I don’t think I've played in conditions this difficult in the US,’’ Graeme McDowell of Northern Ireland said after a 71 left him one shot behind. ‘‘It’s an Open Championship day. It’s a real Friday afternoon at St. Andrews in 2010 before they called it. It was hard out there — really, really hard.’’

Rory McIlroy (74), Francesco Molinari (75), and Jamie Donaldson (70) also were one behind at even-par 144.

Tiger Woods hit three balls in the water and scraped out a 73, thanks in part to a 90-foot birdie putt on the par-3 fourth hole. Phil Mickelson made back-to-back-to-back double bogeys en route to a 75.

Both were still in the mix, six shots behind.

PGA — James Driscoll matched the Puerto Rico Open record with a 9-under 63 to take a one-stroke lead after the second round.

Playing in wind gusting to 20 mph at Trump International in Rio Grande, Driscoll, a Brookline, Mass., native had an eagle and seven birdies in his bogey-free round. He had a 12-under 132 total.

‘‘I had the putter going pretty hot today,’’ Driscoll said. ‘‘I was fortunate. I hit a bunch of shots pretty close, too. I judged the wind. Luckily, I read the wind right a couple of times. The wind was pumping pretty good. It was blowing about 20 miles an hour, but there were a few times I had some crosswinds and just judged it perfectly and hit it in there to about a foot or so.’’

PGA Tour rookie Chesson Hadley was second after a 65.

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