The location of Yankee Stadium was not picked for its proximity to parking. Most people took public transportation to the game.
I would guess that most still do.
Clearly on this day, the need to park spilled over to the fields next door.
Now don’t quote me on this, but I BELIEVE these baseball diamonds where everyone is parking is actually the site of the NEW Yankee Stadium while the old park in the background is now a public park.
I could be wrong. I’ve been wrong before.