Amateur Jackson Koivun, U.S. Ryder Cup Team's performance among five storylines to follow Sunday at Procore Championship – PGA Tour

Amateur Jackson Koivun, U.S. Ryder Cup Team’s performance among five storylines to follow Sunday at Procore Championship  PGA TourPower impresses as Griffin enjoy halfway lead in Napa  RTE.ieScheffler’s sub-70 streak ends as Hughes leads  BBCBen Griffin catches the eye on PGA Tour ahead of his Ryder Cup debut  The Irish IndependentProcore Championship: Ben Griffin leads charge of US Ryder Cup players but Scottie Scheffler eight behind  Sky Sports