At Valhalla, Kentucky, the American defeated the charging Bryson DeChambeau and Viktor Hovland to win on 21 under, the lowest total in a major by a single shot.
The 30-year-old Californian fired 62 in the first round to tie the major record for the best round at a major and went on to lead the competition. He won the Wanamaker Trophy by one stroke with a six-under 65 total.
#uspga