I know this as I am a Yankees fan and followed the construction of NYS fairly closely. I'm just saying that parkland hasn't really been utilized as many thought it would. They should just build on it there's more parks around the area. The soccer field/running track on top of the parking lot gets better use than the baseball fields where Yankee Stadium once stood.As BxLio91 said, and this has been pointed out somewhere earlier in the 111 pages of this thread, parkland was swapped for parkland so that the new Yankee Stadium could be built.
The city gave the Yankees more than 20 acres of prime parkland on which to build the team’s $1.3 billion new home. As part of the deal, the city built eight new parks and redeveloped several city-owned parking lots to make up for the lost parkland.(Contaminated parkland it turns out)