Poston, 31, ranked 64th in the world, finished with a 22-under-par total of 262 at TPC Summerlin, to beat Ghim by one stroke.
Ghim had an eagle and four birdies in his six-under-par 65, including a six-foot birdie at the last that put him on 21-under 263.
Poston, tied for the lead when darkness halted play on Saturday, birdied three of his last five holes to complete a five-under-par third-round 66 on Sunday morning to take a three-stroke lead over Ghim into the final round.
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Denne historien er fra October 22, 2024-utgaven av The Citizen.
Start din 7-dagers gratis prøveperiode på Magzter GOLD for å få tilgang til tusenvis av utvalgte premiumhistorier og 9000+ magasiner og aviser.
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