Jason and charlie shared the lead at Bay Hill Club & Lodge

Birdies on a couple of his final three holes lifted Wi's name to the top with the Arnold Palmer Invitational leaderboard, carding a six-under-par 66 that gave him a two-shot advantage on his nearest pursuers because the morning groups finished from exploding Hill Club & Lodge.

Wi had predicted his score may not endure and that he was right, as Dufner came through while using afternoon groups to post an impressive round ending having a duplicate 66. Dufner had one bogey for the round plus an eagle three for the par-five 16th.

"I've never really done well here," said Wi, whose previous body of training away Hill may be last year's tie for 24th, two missed cuts and a withdrawal.

"If I needed known (I'd be) a few under today before I teed off, I'd personally happen to be extremely pleased. To shoot 66 is often a pleasant surprise."

Nick Watney led the chase pack after a dent 68. Tiger Woods was among seven players another stroke back at Taylormade Burner 2.0 irons three under, leaving which has a ho-hum 69 that included solid ballstriking but also some three-putt bogeys.

"Could have shot five-under par without hitting it real close," said Woods, who added which he hardly gave any thought to the sore Achilles which has been the golf world's focus for the past Ten days.

"Not produce in any respect," he stated. "I'm just on the market playing. I'm feeling good; I have been getting treatment. Everything's good. No swelling."

Justin Rose, winner at Doral a couple weeks ago, also was one of many group at three under, along with Players Championship titleholder K.J. Choi, Sean O'Hair, Jimmy Walker, Bubba Watson and Kim.

Kim aced Bay Hill's 203-yard 17th hole, seeking the range using a five-iron. Unsure it went in, he needed confirmation from playing partner Zach Johnson before breaking a grin.

Punching the green continues to be an issue," he said, "so which makes it inside the hole was nice."

Kim, still trying to find reduce bad habits grabbed while battling a wrist injury, has made the cut just the once in six previous starts this season.

It had not been the only ace marriage ceremony as Ryan Moore carded a late hole-in-one at No.7 from 203 yards callaway razr x irons away with a 5-iron. Moore, however, only agreed to be able to find in at one-under-par 71.

Phil Mickelson opened having a one-over 73, though he battled back from the pair of early double bogeys to birdie three of his final six holes.

Players were greeted by sunny skies and brezze that got stronger at midday, helping a Bay Hill layout that's revamped 3 years ago hold a unique.

"We didn't make any major changes," said Palmer, who once tinkered using the layout annually but has eased off since the upgrade.

"Through many years, we're going to continue to do the discount golf clubs things which we are doing to generate the golf course better, and also to increase the risk for players come here and enjoy the competition."