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Huston started on No. 10 and was even par halfway through his round before making a big move on the front nine at soggy Fox Chapel. Huston shot 5-under 30 coming in, including four birdies and an eagle on the short par-4 seventh. The 52-year-old Huston missed three months this season because of lower back problems.

Fred Couples, Duffy Waldorf, Fred Funk and Russ Cochran were a stroke back. Colin Montgomerie had a 69 in his Champions Tour debut. The start of play was delayed nearly five hours because of heavy rain.

IRISH OPEN

MAYNOOTH, Ireland (AP) _ Saying he’s “feeling a bit lost” in a difficult year, Rory McIlroy shot a 2-over 74 in the Irish Open to fall eight strokes behind first-round leader Oscar Floren.

The second-ranked McIlroy, from Northern Ireland, had four bogeys and two birdies in wet and overcast conditions at Carton House. Floren, from Sweden, had a 6-under 66.

American Peter Uihlein was a stroke back along with Dutchman Joost Luiten, France’s Jean-Baptiste Gonnet, Northern Ireland’s Michael Hoey and Ireland’s Shane Lowry.