Three players have won the PGA Championship and the U.S. Open in the same year since 1958: Jack Nicklaus (1980), Tiger Woods (2000) and Brooks Koepka (2018).
After winning the PGA Championship earlier this year at Oak Hill, Koepka could become the first to complete the feat twice if he were to win his sixth major championship this week.
When it comes to the Masters and the U.S. Open, a player has won both in the same season on six occasions: Craig Wood (1941), Ben Hogan (1951, 1953), Arnold Palmer (1960), Jack Nicklaus (1972), Tiger Woods (2002) and Jordan Spieth (2015).
World No. 2 Jon Rahm is aiming to be the first non-American to win both in the same season.