Leading 14-3 late in the first half, Grambling State (8-2, 8-0 Southwestern Athletic Conference) forced a punt to get the ball back with just 1 second left. Rather than kneeling on it, Williams found Verlan Hunter for a 41-yard score as time expired.
Jateri Pouncey returned an interception for a 22-yard score on UAPB's first possession of the second half, and Williams hit Hunter for 9 yards 55 seconds later to build the Tigers' lead en route to clinching the West Division title.
Hunter had 77 yards on five catches to go with his two touchdowns for Grambling State.
Brandon Duncan finished 34 of 52 for 459 yards with three TDs and three interceptions for UAPB (1-9, 0-8), adding 51 yards and a touchdown on the ground.