Thank you for your reply.
Now, I have to question this. Let's say the kid has grown up without ever knowing his father was a foreigner. The kid has never thought of himself as anything other than an American citizen and in his own heart and mind he is completely loyal to only the USA. How can anybody realistically claim he has loyalty to another country?
And I think in my scenario, what gets put on the birth ceritificate under father is 'Unknown'. So, according to the official document the child has an unknown father. I only threw the football team with the one foreigner in there to cloud the issue properly. If it's unknown, can we call into question the child's citizenship and/or loyalty?
Our founding fathers.