NAPLES, Fla. John Jacobs wants to move Hale Irwin and Gil Morgan off to the side of the Senior PGA Tour for a change.

Jacobs shot course-tying record 64 today to take a three-stroke lead over Ray Floyd and Isao Aoki after one round of the 54-hole Senior MasterCard Championship.

The 8-under-par also was the best first round in the 16-year history of the tournament limited to past winners on the Tour.

But despite the three-stroke lead, still lurking nearby were Irwin (68) and Morgan (69).

Jacobs, claiming he's seeing better after laser eye surgery two weeks ago, turned in a flawless round at the 7,053-yard Hualalai Resort Golf Club on the island of Hawaii.

"I think it's helped," he said he said of the procedure. "I was hoping to play well, but 64 is a bonus. I've been a good boy all week, so maybe the hula gods are smiling on me. I really had fun out there."

Sharing the fourth spot with Irwin were Bob Dickson, George Archer and Joe Inman. Morgan was joined at 69 by Buddy Allin and Simon Hobday.

Jacobs had three birdies on the oceanside course's par 5s, failing only on the longest hole on the course, the 566-yard 10th, when he missed a 3-footer. He also birdied two of the par 3s with putts of 15 and 30 feet.

Floyd credited his good start to his father, L.B. Floyd.

"I had played couple of years with a little bit of a hip problem and because of it, I couldn't rotate," he said. "That changed my game, forcing me to play a lot with my upper body.

"I was healthy, with no aches and pains, but my bad habits were ingrained in there and it just gave me fits. My dad came down and he said, `You got no rotation of your upper body.' That's when I really started seeing the light at the end of the tunnel."

For Aoki, missing the cut at last week's Sony Open was a blessing in disguise.

"I practised after missing the cut. That helped coming in here this week," he said. "It was difficult to get a feel for putting and chipping at the Sony Open. Today, I had a much better feel than last week."

He said he twisted a back muscle last November and had not played for five weeks.

"After a long layoff, you don't know how you're going to perform," he said. "Today was a nice start."

Thanks to those, Irwin and Morgan, who combined for 13 of the Senior Tour's 38 official money events last year, this year's field of 35 players was extended to include winners from the last two years and major senior champions from the last five.

In the past, only the previous year's winners were invited.

Morgan won last year's tournament, shooting a course-record 8-under-par 64 in the final round to beat Irwin and Gibby Gilbert by six strokes. Morgan's 54-hole total of 21-under 195 was the second lowest in tour history.