I saw the same a few days ago. I think the Group was called Sports Equipment(?).
There were about a dozen posts, all seemed to be the Group creator linking back to the models they made. Some were sports related (shoes, balls, etc.), other models were not (a car)... unless we make the stretch to consider a sports car a piece of sporting equipment (like a ball, or bat).
I don't see any sport related Group today. Were some groups removed? Is it possible for a member to delete a group?