Champ qualified for the 2017 U.S. Open through sectional qualifying, where he had to compete in a playoff. It was his first major appearance. After two rounds, he was tied for eighth place, and was also leading the driving distance statistics. Along with Scottie Scheffler, he was one of only two amateurs to make the cut. Scheffler finished as the low amateur at 1-under-par, while Champ finished at even-par.