I'm old enough to very well remember catching Caray w/Jack Buck on KMOX on nights when there were either no Astros games or else the Cardxs were on the coast and the Astros weren't. In fact, the first team I tinstinctively think of when I hear his name is the Cardinals. But then again, I'm old...
The thing a lot of people forget is that for a looooong time, the Cardinals were as close to a "Southern" team as there was, and even after the Braves came to Atlanta, the Astros to Houston, and the Senators/Rangers to Arlington, it took a while for any "regional identity" for those teams to "take" among fans. Well into the 1960s, I'd find older folks in Texas who didn't give a flip about the Astros, but they still followed the Cardinals. Truth be told, I still have a gut liking for them, based on the youthful imprinting of Bob Gibson (to this day, still my ideal pitcher, a total badass!), Lou Brock, Tim McCarver, Ken Boyer, Curt Flood, that whole crew.
Quite the team, and KMOX came in just as well as anything after the sun went down...