Alcorn State (7-2, 5-1) almost scored on Southern’s opening possession in OT when Jestin Williams returned an interception 88 yards but he was tackled on the 4-yard line.
Southern (4-4, 4-2) had scored 21-straight points, including two Dray Joseph TD passes, to take a 38-35 lead but the Braves tied it on Greg Pittman’s 38-yard field goal with 38 seconds left.
Joseph completed 25 of 45 passes for 329 yards and three touchdowns, two to Randal Menard, who had 119 yards on three catches.
Alcorn State countered with Walker, who had 156 yards and two TDs on 28 carries. John Gibbs Jr. had 239 yards passing for the Braves with two touchdowns, completing 16 of 28 passes, and ran for another score.