With its defense so effective, J-D could stay patient on the other side of the ball, and indeed neither team scored until the second quarter.
From the Purple Tigers' 13-yard line, David Sacco went to the end zone and found Demetrius Mitchell for the touchdown. That, plus Dennis Petrovic's extra point, allowed the Rams to go to the break with a 7-3 lead.
Gaining a cushion in the third period, J-D moved to Cortland's six-yard line, from where Jailaan Kinsey ran in for his team's second touchdown of the night.
Though the Rams didn't score again, the defense made sure that the 10-point margin remained quite safe, stopping every Cortland attempt to get closer.
On Thursday night, J-D (3-3) will face first-place Fulton at Central Square, where the Red Raiders are playing home games while its own artificial turf field is installed.
ESM will meet Nottingham Friday night at Spartan Stadium. The Bulldogs routed Mexico 53-18 in its last game and, by doing so, forces ESM to win this game to assure itself a home game in the first round of the Class A playoffs.