Instead of holding the status quo, Dufner has torched a soggy Oak Hill Country Club through 16 holes, playing seven strokes better than par for the day and holding the lead at 9-under.

Dufner began his charge with an eagle at No. 2, followed by birdies at Nos. 4 and 5. The back nine has proceeded just as well. At No. 13, he put a good stroke on a medium-distance putt to give himself separation from the pack.

Adam Scott, Matt Kuchar and Jim Furyk all stood at 7-under.

Though Dufner has yet to win on the PGA Tour this season, he managed ties for fourth at the U.S. Open and the WGC Bridgestone Invitational last week. Those were encouraging signs for one of those very good players who has yet to win a major.

“I think I’ve just got to keep plugging away and playing,” he said. “With the pressure of trying to win a major, it's obviously difficult.”

Just as tough, the leader is being chased by some talented rivals, with the likes of Robert Garrigus, Justin Rose, Henrik Stenson and Webb Simpson within a few strokes.

Tiger Woods struggled around the turn, dropping to 1-over after 11 holes.

Tiger Woods moves back to even par | 1:04 p.m.

The fashionable color of the day at Oak Hill Country Club?

That would be red.

The leaderboard is filled with players shooting low numbers for the second round, making the PGA Championship look something more like the Greater Milwaukee Open.

Just look at the three golfers tied for first at 7-under. Jason Dufner was shooting five strokes better than par through 11 holes. Robert Garrigus was 4-under for the day through 13 and Adam Scott was almost as sharp with his round.

Of course, Webb Simpson set the stage early by tying the competitive course record with a 64. Even Tiger Woods was getting in the act, making birdies on Nos. 5 and 6 to pull himself back to even for the tournament.

The weather provided a perfect recipe for all those red numbers, with rain soaking the greens and gray skies brightening to sun as the hours passed.

“The course is obviously softening up, and I'm sure some guys will take advantage of that,” Scott said.

The only player who couldn’t make good on the conditions was Woody Austin, who talked about the four-stroke penalty he incurred for carrying 15 clubs in his bag -- one more than allowed.

“Can't say I was angry, because it was more ... I don't know, it was more of a shock, so you're kind of like pretty bummed,” he said. “That's the first time I've ever done something like that. Now all I've got to do is figure out how to get DQ'd.”

Webb Simpson talks about his great round (Noon update)

What a difference a day can make.

During the opening round of the PGA Championship, Webb Simpson found himself at 5-over through eight holes. Not a good place.