John Oda fulfilled all the promise he has shown the past several months Sunday, winning the State Stroke Play Championship with a birdie on the final hole at Pearl Country Club.

Oda won by two shots over Seabury Hall senior Alex Chiarella, who knocked it in from the fairway for eagle on the 12th to fuel a run that caught Oda five holes later.

Oda would not be denied. The Moanalua High sophomore gathered himself on the 18th tee and hit his 3-wood into the fairway, just as he planned. From 110 yards out, he hit a 52-degree wedge 6 feet below the hole, also according to plan.

Chiarella’s drive blew over the cart path and into the trees on the left.

"I pulled out a 3-wood because I had no confidence in driver at that point," he said. "The wind was way stronger than I thought."

He was inside 100 yards, but with no real shot at the pin. Chiarella managed to avoid the trees with his approach, but air-mailed the green. A desperation chip for birdie slid below Oda’s ball.

Chiarella finished with bogey and an even-par 72. Oda, again according to plan, drained the birdie — his seventh one-putt on the back nine — for a 71. His 72-hole total was 4-under 283. Pearl played to a par 71 on Friday when the seventh hole flooded and was cut from a par 4 to a par 3.

Rudy Cabalar Jr., the 2010 state high school champion, shot 72 and was alone in third, four shots back. Defending champion Lorens Chan, the 2009 and 2011 state high school champ, took fourth with the day’s low round of 68. It was Chan’s first tournament since he had surgery Feb. 1.

Chiarella, Cabalar and Chan are all 17. Oda is 15 and the hottest golfer in Hawaii.

"He’s the most consistent player in Hawaii at the moment," said Chiarella, who will play for the University of San Diego golf team in the fall. "He is steady. His putting is impeccable. His long game is straight, straight, straight. He just was clutch."

Since last May, when he reached the final of the Manoa Cup — Hawaii’s state amateur match-play championship — Oda has been in contention constantly.

He won the amateur exemption for this year’s Sony Open in Hawaii.

A month ago, he lost a playoff with Korean pro Jun Woo Park for the Hawaii Pearl Open title, getting there by playing the 18th hole precisely as he did Sunday.

"We learned a lot at Pearl Open time," Oda grinned. "The play was 3-wood and try and get it in the fairway. I wanted a flip wedge to the green."

Last week, he and partner Seungjae Maeng closed with a torrid 61 to force a playoff for the Hawaii State Golf Association Four-Ball Championship. They lost to defending champs Donny Hopoi and Jared Flores in a playoff.

Oda birdied the 12th Sunday and, even with Chiarella’s eagle, was up at least three shots on everyone.

Only the eagle got Chiarella going.

"That was about it. I really hadn’t had any spark before that point in the round," Chiarella said. "I hit about one fairway and two greens, but managed to be a couple over. That eagle sparked my round a little bit."

Oda one-putted the next two holes for par, but three-putted the 15th and put his ball in the water at the 16th, one-putting there for a second straight bogey. He also struggled on the par-5 17th. While Chiarella got there in two and made an easy two-putt for birdie, Oda went left, short and center — through the green — and needed yet another one-putt just to stay even.

"The 17th was kind of crazy," he admitted. "I was totally grinding that out."

He made most of those shots, thanks in part to a quick lesson he requested with Hawaii Golf Hall of Famer Brandan Kop.