It'd be interesting to locate prewar examples that show Chicago's "Sharkey brothers" (White Sox clubhouse men Art and Ephraim Colledge), as they purportedly first worked for the White Sox before WWI and continued in that capacity for decades, with Ephraim last appearing on a Topps team card in 1967. They're named as "Sharkey" on the 1933 R309 Goudey AL All-Star team photo and at least one of them appears on Topps team photos from 1951-67.
More details on the Sharkey brothers:
https://www.number5typecollection.co...baseballs.html
I'm told Pete Sheehy served a similar long tenure (1920s-80s) for the Yankees, so might well appear in team photos and other official marketing throughout that time.