North Union earned a home playoff berth and will face Galion at 7:30 p.m. Friday.
River Valley plays Napoleon at 7 p.m Saturday at Napoleon.
North Union, in Division IV, Region 14, came into Friday night's game fifth in the region and beat Highland 29-0.
The Wildcats won the Mid Ohio Athletic Conference Red Division title with a 9-0 league mark. They are making their fourth straight playoff appearance, but the Wildcats are looking for their first postseason win after going 0-3 over the last three seasons.
They are led by a strong running game keyed by a large offensive line. Defensively, the Wildcats are just as tough.
The Vikings are 8-2 and are led by a strong rushing attack which averages more than 340 yards per game.
This is their second straight playoff appearance.
River Valley finished 8-1 in the MOAC for second place in the Red Division.