Emiliano Grillo, 17, of Resistencia, Argentina, tees off in Thursday's third round.

Top Amateur golfers Andrew Yun, 20, of Chandler, Ariz., and John Hahn, 22, of Hudson, Ohio, talk on the tee before beginning their third round Thursday.

North Shore CC Western Amateur Committee Co-Chair Philip FitzSimons with WGA Associate Tournament Director Patrick Timson.