STATE FARM STADIUM (Glendale, Ariz.) — With his USA jersey slung over his shoulder and the history-making ball in hand, Cavan Sullivan almost looked overwhelmed as he fielded questions from a throng of reporters in the bowels of the 60,00 seat arena he had just about silenced an hour before with one swing of his right foot. During his 65 minutes on the field in Saturday’s 3-0 drubbing of Mexico, he was anything but. Sullivan, who had only turned 17 just five days earlier, became the youngest goalscorer in the century-plus history of the U.S. men’s national team, helping the Americans secure th...