Koepka off to record-setting start at PGA Championship

Brooks Koepka, right, shakes hands with Tiger Woods after finishing the first round of the PGA Championship golf tournament, Thursday, May 16, 2019, at Bethpage Black in Farmingdale, N.Y. (AP Photo/Julio Cortez)

FARMINGDALE, N.Y. — Three majors in two years, and Brooks Koepka can still feel as though he has something to prove.