Elba (Ala.) running back Alvin Henderson has already established himself as an Alabama high school football legend. The four-star Auburn commit has his name next to multiple state records and is amidst what could go down as an all-time senior season. He erupted for another impressive performance this week. In a 57-53 win over Brantley (Ala.), Henderson collected 319 yards and five touchdowns on 25 carries. While some would call that measly, given the standard he’s continued to set for himself, it was another excellent outing for the 5-foot-9, 195-pounder. Now through five games as a senior, He…