I'm not very well-versed in sports specifics or history, but I've enjoyed browsing the Fleer Sticker Project blog. Though the blog's primary goal is cataloging Fleer team stickers included in card packs—namely baseball and football, the collected designs and photos show logo, product and technological evolution; packaging and branding history; and graphic design trends. See some highlights below, and click over to the blog for more images and historical narrative

Some other hand-picked posts you might enjoy on our Design Blog:

Best of the West: Vintage Travel Posters from the Boston Public Library Archives
Soccer Legends Poster Design Series by Zoran Lucić
Athlete Objects: Sport Nickname Illustrations from Jesse Hora