 For one Olympic sport, you don't have to medal, you just have to make the Olympic team. In fact, you don't even have to make the U.S. Olympic team. If your grandparents were from France and you're able to get on the French national team, go for it. If your grandparents were from Mexico or your aunt, you have enough Mexican blood that they say, yeah, you can come play for Team Mexico, go for it.