Negro baseball cards would be included in baseball. We'd add them as their own sets instead of adding them as a separate sport. Please let us know if we are missing particular sets of interest for those.
I changed this to a particular sport. We have suggestions for some other sports but breaking it out into boxing only helps us know which sports people want us to focus on next.
We already have requests for Boxing cards (please vote for that)
https://sportscardpro.userecho.com/en/communities/1/topics/119-add-boxing-cards
Negro baseball cards would be included in baseball. We'd add them as their own sets instead of adding them as a separate sport. Please let us know if we are missing particular sets of interest for those.