Tiger Woods has never done it.
Neither did Jack Nicklaus, Arnold Palmer, Walter Hagen, Ben Hogan, Nick Faldo, Annika Sorenstam, Nancy Lopez or Juli Inkster.
Only Babe Zaharias, Bobby Jones, and now Inbee Park.
It would be winning the first three majors of a golf season.
Park won the US Women's Open by four strokes over I.K. Kim on Sunday with a final-round 74 at Sebonack Golf Club in Southampton, N.Y.
It followed her wins at the Kraft Nabisco Championship in April (by four strokes over Ryu So-Yeon) and the LPGA Championship earlier in June (in a playoff over Catriona Matthew).
As Randall Mell of Golf Channel reported, Nancy Lopez remarked on the incredible feat: "I never even thought of trying to win the first three majors of the year. It's pretty monumental."
The LPGA Tour has changed to a five-major format for the first time in its history this year so Park still has two tournaments to win to complete the women's grand slam.
But with a win at the British Open in August she can become the first golfer (men and women included) to ever win four professional majors in a single season (remember: Bobby Jones' grand slam included the US Amateur and British Amateur).
The hyperbole doesn't stop there for Park.
It was her sixth win of the season (reminder: we haven't hit July yet) which is downright Tiger-esque. Park also joined Zaharias, Pat Bradley and Mickey Wright as the only women to ever win three majors in the same calendar year (with two left!).
Park also became the 22nd woman in history with at least four career majors.
She's 24 years old.
At 8 under, Park was one stroke off the lowest US Women's Open score ever in relation to par -- set by, who else, Park herself in 2008.
Though she briefly ceded the No. 1 spot in the world to Stacy Lewis earlier this year, there's no question who rules women's golf now.
So where do we go from here? Well, we go to the Old Course at St. Andrews the first week of August. I can't think of a better place for Park to make history.