The ones I’d be definitely interested about adding:

• basketball reporters to !nba@nba.space and each team to their corresponding team (e.g, @celtics@sportsbots.xyz to !celtics@nba.space)
• NFL reporters to !nfl@nfl.community and each team to their corresponding team (e.g, @patriots@sportsbots.xyz to !patriots@nfl.community)
• Football (soccer) reporters to !main@soccer.forum and their teams.
• Baseball to !baseball@fanaticus.social (if the admin allows)
• Tennis players and reporters to !tennis@matchpoint.zone

fanaticus.social seems a bit zombified. Instance hasn’t been updated since 0.19.3, last I checked the admin hasn’t been active for months and the baseball communities (which were in the beginning the most active) were pretty much silent the whole season.

I have a handful of sports-focused instances which would surely benefit from this:

• !nba@nba.space (and communities for every NBA team)
• !nfl@nfl.community (and for the teams)
• !main@soccer.forum (and the main leagues/biggest clubs)
• !tennis@matchpoint.zone

Would it be one bot per mirrored account?

Yes. There is no information on sportbots about how many accounts they have listed, but I’m guess it’s in the “high hundreds - low thousands” range.

There would probably need to be some fine-tuning about the number of posts. Some reporters post a lot, that could potentially flood those communities.

With options (2) and (3), I could come up with strategies to solve this. We could, e.g, repost only what has reached a certain number of likes on Twitter, or limit one bot to post only once per hour/day. Etc.