Fresno Giants:
Reno Padres:
Fresno and Reno are "unofficial", since I couldn't find any photos. They seem like logical choices, though.
These two, however, are real.
Greenville Braves:
Lynchburg Mets:
That Lynchburg one is Penny Marshall's favorite baseball cap, I bet. And if you don't get that reference, you're too damned young.