Here's the pic referenced in this thread. The cubs are on page 3. The cover subject for this issue was Charles Adams from the 1909 Pittsburgh team.
This is from the LA84 Sporting Life Magazine database, which has scanned copies of the magazine going back into the 1880s! Its an amazing resource for collectors. I have not found a comprehensive list of cover subjects / interior photos, so you have to fish around abit to find what you are looking for, but I can spend days in the database for sure!
Here's the link to the Nov 6, 1909 issue as well:
https://digital.la84.org/digital/col...d/29876/rec/45