Masters champion Mike Weir finished second after a final-round 71. The left- handed Canadian finished at 1-under-par 143, followed by PGA Champion Shaun Micheel, who carded a 2-under 70 to come in at 1-over-par 145.
British Open winner Ben Curtis came in last. He shot his second consecutive 1-over 73 on Saturday and finished the two-day event at 2-over-par 146.
This event is reserved for the four major winners in 2003 and was a 36-hole stroke-play event. For the first time since 1992, all four of these combatants are first-timers.
'We were all fooled out there quite a bit,' said Furyk, who earned his first major in June at Olympia Fields. 'In the long run, I was the fortunate one. I made the most putts.'
Furyk pocketed $400,000 for the win. Weir took home $250,000, Micheel earned $200,000 and Curtis walked away with $150,000.
Furyk struggled early with his game, missing the first fairway but saving par. He missed the green with his tee ball at the par-3 third but once again found a way to save par.
The reigning U.S. Open winner returned to his birdie ways at the fourth when he ran home an eight-footer. He saved some spectacular pars, including a 50-foot chip from the top of a mound at the ninth, and owned a five-shot cushion as he headed to the back nine.
None of the other players made a move at Furyk's seat atop the leaderboard so Furyk cruised. He drained a 20-foot birdie putt at the 10th, but missed a great opportunity to pad his lead at 11 when he knocked his tee ball to two feet but missed the putt.
Furyk atoned for the miscue at 11 with a seven-foot birdie putt at No. 12. He laid up short of the putting surface at the par-5 14th then wedged his approach to four feet to set up birdie. At the 15th, Furyk recorded his first bogey since the third hole Friday when his ball, covered in mud, missed the green right.
He parred 16 and 17 but closed out his big victory in style with a 10-foot birdie putt at the last.
Furyk won the now defunct Kapalua International in 1995, hoisted the trophy at the Sony Open in Hawaii in '96, then captured the Mercedes Championships in 2001. He owns a house on the The Plantation Course at Kapalua, where the Mercedes is played, and now owns the 'Hawaiian Slam.'
'They need to bring more events to these islands,' joked Furyk. 'I knew there was always one missing.'
Weir hit rocks near water on the seventh but hit an amazing recovery shot. He turned the putter sideways and knocked it to 10 feet but missed the putt and the par.
'I found a new use for my putter,' said Weir. 'It didn't do very good on the greens but I'll start chipping with it maybe that will work. It was a good shot.'
He made birdie on 18 to join Furyk under par for the tournament.
Micheel birdied four holes on the back nine to vault past Curtis into third. Curtis never mustered a charge Saturday and fell into last.