Thompson hit a solo shot in the third inning off Biscuits starter Marquis Fleming to give the Barons a 3-0 lead. His two-run blast in the seventh off
The Biscuits scored in the third inning. With two outs, Ryan Brett singled and scored on a Shawn O'Malley double.
The Barons grabbed the lead in the first inning. Micah Johnson hit a leadoff single, stole second and scored on a David Herbek single. With two outs, former Auburn running back signee Brandon Jacobs singled home Dan Black.
Montgomery will take a 70-69 overall record into Monday's season finale.