In a matchup of Southwestern Athletic Conference division leaders, Grambling State (4-3, 4-0) also became the lone undefeated team in conference play by knocking off Alcorn State (5-2, 3-1).
Williams opened the scoring with a 2-yard touchdown run and extended the lead to 21-0 on a 26-yard touchdown pass to Ka'Jandre Domino. Williams added his second touchdown run early in the third quarter to make it 28-7 before Alcorn State rallied with a pair of fourth-quarter touchdowns.
Grambling State sealed the victory on the final play, stopping the Braves' hook-and-lateral play near the 20.
Zerick Rollins found Alondrea Young for a 5-yard touchdown pass - on a fake field goal - to cut the Braves' deficit to 21-7 before halftime.