A small change is making a difference for Kelly Shon.

The LPGA pro from Port Washington is a stroke out of the lead after the first round of the Marathon Classic yesterday in Sylvania, Ohio. She shot a 4-under-par 67 and trails three players by a stroke.

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“I missed those two cuts, consecutive two cuts back in Michigan and Arkansas,” Shon said. “I finally said, ‘I think I need to make a little swing adjustment.’ I did. Since then, I’ve been hitting the ball a lot better. I’ve been putting well pretty much all season, so just that little swing change I think has helped me.”

Hyo Joo Kim bogeyed her final hole for a 5-under 66 and a share of the lead with fellow South Korean player Mirim Lee and Japan’s Haru Nomura. Top-ranked Lydia Ko birdied her final two holes to join second-ranked Brooke Henderson in the group at 68. Annie Park of Levittown shot a 73.

Shon finished tied for 52nd last week in the Women’s U.S. Open at Cordevalle in San Martin, California.

“In the U.S. Open, you know, it’s obviously a really tough course last week,” Shon said. “I try to just keep the same mentality, which is just patience. That key word, ‘patience,’ has kind of been the theme for my entire year so far. I’ve been just kind of grinding away, and hopefully I’ll be able to keep at it the next few days.” Staff and wire reports