PC schools have always shared the stadium at Putnam City. In fact, until West opened in the late 60's, it was known as Pirate Stadium and it was then renamed to Putnam City Stadium to be inclusive.

It used to be that the schools needed that big stadium but now the crowds are only a few thousand on a good night, so the on-campus option is at least doable.

Edmond was renting from UCO so it makes some sense to build their own but I don't completely understand the logic with PC schools. I suppose it has something to do with trying to build more of a community at the school itself.