“Not going to lie, I just wanted to spank you,” Koepka told DeChambeau upon clinching victory on the ninth hole.
Koepka won the second hole with a 15-foot birdie putt, then added birdies at Nos.
DeChambeau hurt his chances to rally by missing a birdie putt at No 8.
At the par-3 ninth hole, DeChambeau conceded the match after missing another putt for birdie.