Ebbets is gone. You can have Polo Grounds. When real-life expansion happens in 1961 for AL and 1962 for NL, you have the option of moving. However, you'll have to spend 4 years in San Fran first, and there is the possibility Leeelci might want to move from Ebbets back into NY after 4 years in LA. I will settle that in 15 seasons.

Cleon, you can have Yankee Stadium. I will take DC, eventually Minnesota. Or in my case, I can squat in DC and move to Texas in 1972. (Washington as a city is pretty squat-worthy in a different sense, but that's beside the point.)