Mamaroneck, N.Y. ? The kid wore a big smile, even after shooting an 81. Tadd Fujikawa made history at the U.S. Open on Thursday, and it had nothing to do with a lackluster round that included three double bogeys.

The USGA initially said the Hawaii high-schooler would be the second-youngest player to participate in an Open, behind only Tyrell Garth Jr., who played in 1941.

But after contacting Garth at his home in Texas on Wednesday, the USGA had to amend the record book. Turns out Garth was 15 years, 11 months and 27 days when he played. That’s actually older than Fujikawa, who is 15 years, 6 months, 7 days.

Fujikawa, who stands 5-foot-1 and weighs about 135 pounds, officially put his name in the record book when he teed off at 9:12 a.m.

He four-putted No. 1 en route to a double bogey and added three more 6s after that before walking off the course with absolutely no complaints.

“It was a lot of fun out there, actually,” he said. “I hit a lot of great shots. I think I missed a couple of drives that cost me a couple of double bogeys, (but) my score didn’t really tell how my day went.”

The point was that he was a 15-year-old playing in the U.S. Open, and that in itself was reason to be proud.

“Just being here and having the crowd behind you and supporting you, it’s a really good feeling,” he said. “It’s the U.S. Open, so I better have fun. No matter what I shoot, I’ll have fun.”

Fujikawa said he wasn’t nervous, even though he’d never before played in front of so many people or in such a prestigious tournament.

His mother hung around well after the round and said Tadd wished he’d done better.

“But he’s not down or anything,” Lori Fujikawa said. “He just wants to get out there tomorrow and try again.”