Random questions

Whose house is on the Cardinals spring training property? You see it on a lot of Cardinals cards in the mid-1980s.

Why is Greg Mathews using his batting helmet as a glove holder? (Hey, I'm a pitcher, what else am I going to do with it?)

Why is the guy behind Greg Mathews wearing a rain hat when there isn't a cloud in the sky?

Is he supposed to be the guy in this crowd on the left below? And is this a record for rain hats on one card?