Great find !
Fun fact. I learned that the favorite baseball teams in the south from the 1930s up until the early 60s were the Cardinals and the Chicago White Sox. They had an enormous radio presence. Lots of affiliates.
If you want to read a fun history about how the St Louis Cardinals & everybody else, came into being - "The Summer of Beer and Whiskey". By Edward Achon. The sub-headline tells the story. " How Brewer's ,Bar keeps, rowdies, immigrants , and a wild pennant fight made baseball America's game." 1884.