Alvin Henderson has terrorized opposing defenses for Elba (Ala.) High since he arrived on the scene as a freshman. On Friday night, he reached a historic milestone, etching his name into Alabama high school football history. Early in the second half of Elba’s game against Florala, Henderson scampered for 7 yards to pass Mac Campbell (9,839 yards) for the Alabama High School Athletic Association (AHSAA) all-time rushing record. He’s also on pace to become the seventh player ever to reach 10,000 career rushing yards, According to the National Federation of State High School Associations’ (NFHS) …