Ah-hah!
It was the old Phoenix Municipal Stadium used by the Phoenix Senators of the Arizona-Texas Leagues.
http://www.digitalballparks.com/Cact...uni_640_2.html
http://www.digitalballparks.com/Cact...uni_640_5.html
http://www.digitalballparks.com/Cact...uni_640_6.html
Yay! Now I can paint some of those scenes with confidence. And that's important!
Graig