What Navy fans need to know about the Mids’ appearance under the Friday-night lights: Who, where, when: Navy (2-3) at Central Michigan (2-3, 0-2 Mid-American Conference), Friday, 8 p.m. TV: ESPN2 (Carter Blackburn and Rod Gilmore have the call). Gambling is illegal in most states: Central Michigan is a two-point favorite. Meet your starter: Freshman Keenan Reynolds takes over quarterbacking duties from junior Trey Miller. Miller was unable to practice Wednesday due to a nagging ankle injury, according to The Washington Post, making head coach Ken Niumatalolo’s decision easier. The Washington Times reports Reynolds will be the first freshman to…