There Were Actually 4 Yankee Stadiums On The Same Site

The Original Triple Decker didn't enclose the park. In fact from 1923 to 1927, The Stands stopped short of The Foul Lines. It was in 1928 That the LF Stands were erected:

It was in 1937 that the RF Stands were Completed. Only Lou Gehrig would play in YS I, II and III, from 1925 until 1939;

So the Stadium stayed the same, going through Cosmetic Changes in 1967;

Then The Site closed, then was torn down and Completely-Rebuilt;

Hence, Stadium IV is closing and it's a modern facility;

Later!