In 2016, Summerhays earned an entry into the U.S. Open by being fourth alternate, after going through sectional qualifying, he would finish the tournament T-8 to earn an exemption into the 2017 U.S. Open. Later in the year, at the PGA Championship, Summerhays finished in solo 3rd after birdieing six out of his last 10 holes in the final round. His finish earned him an invitation into the 2017 Masters Tournament and the 2017 PGA Championship.