I feel like we probably haven't seen the best of Koepka yet.
I kind of get the vibe that part of what makes Koepka so good is that he doesn't really care. Most other big names on tour were college stars, expected to be standout tour players and win majors, love golf and feel their lives have been building to this point. Guys like Rory, Spieth and JT have so much pressure to win majors. Koepka? He said he prefers baseball, golf is like a job to him. If Koepka didn't win another major the rest of his career, everyone would just say, well he got hot for 3 years and won 4. If Rory didn't win another major, everyone would say he kind of missed expectations.