What Navy fans need to know as the Mids prepare to wrap up 2012. Who, where, when: Navy (8-4) vs. Arizona State (7-5, 5-4 Pac-12), AT&T Park in San Francisco, Saturday, 4 p.m. Eastern (1 p.m. Pacific). TV: ESPN2 (Dave Pasch and Brian Griese have the call). Gambling is illegal in most states: Arizona State is a 14-point favorite. How they got here: Navy’s known its postseason fate for a while — a Nov. 3 win over Florida Atlantic made the Mids bowl-eligible, and they were locked into the Kraft Fight Hunger Bowl via a preseason agreement. As for momentum…