Rivers’ first score came on a ten-yard touchdown run late in the first half, giving the Jaguars a 7-0 lead heading into halftime.
A one-yard touchdown run in the third quarter gave Stephenson a 15-6 lead.
Rivers’ final two touchdowns came on runs of 19 and six yards in the fourth quarter to secure the victory.
“Dallas had a tremendous impact and a lot to do with our win,” Stephenson head coach Ron Gartrell said. “This was his first game with us and seemed to get better throughout the contest.”
Rivers has verbally committed to play football at Vanderbilt University next fall.
The Jaguars will return to action on Friday against Dunwoody.