Joost Luiten was 8 under par after 14 holes in his first round of the 94th PGA Championship.
The Netherlands native appeared poised to challenge the major championship single-round scoring record of 63. Then, he closed with four consecutive bogeys to shoot 4-under 68 and trail leader Carl Pettersson by two shots.
"I played really well and then to finish the round with four straight bogeys is not a good feeling," he said. "But it has been a good experience and I just have to take that into the next rounds and try to stay positive."
The 26-year-old admitted he let nerves get the best of him as he finished his round on the front nine at the Ocean Course.
"You can’t deny that you get nervous when you start playing so well in a major and take a big lead but I was just a little bit too aggressive with my putts on six and seven," he said. "I was in the birdie mode and when you are thinking like that all you want to do is to try and make more birdies."