Bubba Watson capitalized on his monster drive on the par-5 16th, two-putting for a birdie that tied him with Martin Kaymer atop the leaderboard at the PGA Championship Sunday. The two are at 12-under, but Watson, playing three groups ahead of Kaymer, has two holes left. As for the rest of the leaderboard, keep the eraser handy. In this most unpredictable of seasons, no way the PGA Championship was going to have a nice and tidy finish. Northern Ireland phenom Rory McIlroy made about an 8-footer for birdie on 14, pulling him within a stroke of Kaymer and Watson. The 21-year-old McIlroy, who tied a major championship record with a 63 in the first round of the British Open, was third at last year's PGA. Steve Elkington, the 1995 PGA champion, is at 10 under along with Dustin Johnson. Former Masters champ Zach Johnson and Jason Dufner were at 9 under. As for third-round leader Nick Watney, he's in full meltdown mode and will rival the collapse of playing partner Dustin Johnson at the US Open. Johnson, the 54-hole leader at Pebble Beach, shot an 82 Sunday. Watney was at 9 over through 13, making double bogeys on his first and 11th holes and a triple on the par-3 No. 7 after dunking his ball into Lake Michigan. This has been one of golf's oddest seasons. Tiger Woods' personal problems have spilled onto the course. Two players shot 59. And Graeme McDowell (US Open) and Louis Oosthuizen (British Open) continued the trend of surprise major winners, with five of the last six won by first-timers. Why should the PGA be any different? After the fog that delayed the first two rounds finally lifted, golf's younger generation turned the major into a showcase. Forget “Glory's Last Shot.” With five of the top six in their 20s, this had the makings of “Glory's First Shot.” Kaymer, who had top-10 finishes at both the US and British Opens, is doing his part. He isn't doing anything spectacular but, with the wind blowing harder than it has all week at Whistling Straits, he only needed to be steady. After moving into the lead, he made five straight pars. Woods got off to a fast start with three birdies on his first four holes, but couldn't keep up the momentum. He finished with a 1-over 73, the first time this week he's been above par. “Striped it early. I didn't miss a shot the first four holes,” Woods said. “After that, I hit it awful.” At least he won't lose his No. 1 ranking, which he's held for a record 270 weeks. Phil Mickelson needed to finish at least fourth, and a bogey on his final hole left him at 6-under for the tournament. But he still finished with his best round of the week, shooting 67 with an eagle on No. 5 and three straight birdies on the back nine. “If I can just start playing well, yeah, I think that I can get that thing done,” Mickelson said of reaching No. 1 for the first time in his career. “But it just wasn't to be this week.” He revealed before the PGA Championship that he had been diagnosed with a form of arthritis that was causing him severe pain but the problem was now under control due to medication.