For real doe, I lived in SA back when he played at Tivy. Kerrville is served by SA TV news and SA papers. The news in SA called him Johnny Football back then. It didn't originate with them, either; it started in Kerrville and they just picked up on it - the same way that ESPN picked up on Aggies calling him Johnny Football and started using it themselves while calling our games.
That said, the first time I heard it used to describe him I thought of Nada Surf! "And if you see Johnny Football Hero in the hall, tell him he played a great game! Tell him you liked his article in the newspaper!"