Doh! Yes, Nicaragua.
At least two players have played both basketball and baseball in the same season, probably more. I remember Gene Conley of the Celics. Dave Debusschere was another. And I think there was pitcher named Reed who played basketball. There were probably a few more, but I don’t know if they played both sports in the same season. Danny Ainge comes to mind.
There is a very good book by David Maraniss on Clemente if you are interested. Aside from trying to understand Clemente, it really does show how pro sports (or really the mega money involved today) has changed not just the game, but the character of the athletes. Clemente may have been the last of a kind.
There are far too many agents and lawyers to allow a young guy to become a Roberto Clemente today.