NAPA, Calif. (AP) — One week Jackson Koivun was leading the Americans to victory in the Walker Cup, the next week he looks ready to take on a couple of Americans who will be playing the Ryder Cup.

Koivun delivered plenty of big shots Friday afternoon in the Procore Championship, none bigger than a 3-iron to 30 inches on the par-5 12th hole for an eagle, and had a 6-under 66 at Silverado to finish three shots out of the lead going into the weekend.

A big surprise? Hardly.

Koivun, who grew up about two hours away in San Jose, is the No. 1 amateur in the world. He already has done enough to secure a PGA Tour card when the Auburn junior decides to turn pro. He has missed only one cut in his six previous PGA Tour starts this year, and in his most recent one he tied for fifth at the Wyndham C

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