Matt,
Not only do you need a history lesson, but your math is a bit rusty as well. By your reasoning, Baltusrol has had not 4 but 5 different courses on the same property!
The original 1895 9-hole “Old Course” at Baltusrol served as the foundation for its 1898 18-hole course that was 2 courses in one, commonly known as the “Short” and “Long” courses. It is this “dual” course that hosted the U.S. Open, Men’s Amateur & Women’s Amateur. In 1910 this course was upgraded and again in 1918 with new 10th, 11th & 12th holes. This course then served as the basis for the two new Baltusrol courses, the Lower & Upper.
Now by your reckoning wouldn't that really constitute another course with the addition of those new holes? But that would really be splitting hairs.
By “basis” I do not simply mean that it occupied the same land. Everything from tees, greens, fairways and entire holes of the "Dual Course" were used to create parts of the two new courses. The following information can be found on pages 48-53 of the book “Baltusrol 100 Years,” the official history of the club. It is a chapter titled “The Old Course: Hole by Hole”:
#1 – Shunpike. “This was roughly the same as One Lower…”
#2- Orchard. This was essentially the same as Two Lower…”
#3- Alps. “The tee was in the same place as the third Lower fairway…”
#4 – Pond. “The fourth green of the Old Course is now the green for Five Lower…”
#5 – Outlook. “The tee for this hole was about where the back tee of the present Eighteen Lower tee is located. The green was halfway in the middle of seventeen Upper…”
#6 – Sleepy Hollow. “The tee for this hole was on Seventeen Upper fairway…”
The chapter details how features from nearly every single hole of the old course was used and incorporated into the two new courses. It ends by stating that, “The 18th [Tappie] was essentially the same as our 18th Upper…”
Now the reason the USGA website states that it has had three courses that have hosted USGA championships is because this same club history states that.
Again, their reasoning is similar to yours. I have no problem with the statement that three differing (note NOT different) courses that have occupied the same land under the same club have hosted USGA championships. I do disagree with the contention that it is in anyway similar to Bethpage with three separate and distinct golf courses that were never part of an earlier course and used features to entire holes to make them (with the exception of a portion of the fairway of the second hole of the Black course which was part of the original 18th hole of the Lenox Hills Club).
I see a big difference. That you don't is just a difference of opinion from me...
By the way, most don't know that the original 1st green is still up there on the hillside left of the 2nd fairway of the Black and can be clearly seen in the 1938 course aerial...