Zhang rocketed into the spotlight Monday night when he became the youngest competitor in the United States Open, according to the United States Golf Association. A second alternate at the start of the day, he was added to the 156-man field to replace Paul Casey, who withdrew with a bad shoulder after Brandt Snedeker scratched because of an injured rib.
It was the second time in as many days that a Chinese golfer had made history. On Sunday at the L.P.G.A. Championship, Feng Shanshan, whom Zhang knows mostly by reputation, became the first player — male or female — from mainland China to win a major.
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