Porter Ridge led by 13 points entering the fourth quarter but couldn't hold on in an eight-point loss to the Ravens. The Pirates cap their season at 8-5.
The Rebels are in the third round of the playoffs for the first time since 1972 after a 17-7 road win over Forest Hills. "We're making history," said Parkwood senior linebacker Cory Rape.
Weddington is in the state quarterfinals in football for the first time in the school's 14-year history after a win at the second-seeded team in the 3AA bracket.
The Redhawks improved to 10-2 with a 38-point home win over R-S Central in the first round of the 2AA playoffs.
Union Academy is in the second round of the 1A playoffs after shutting out South Stanly for the second time this season. The 6-5 Cardinals will play at Albemarle in the second round.
First-round playoff scores involving Union County:
4A - Porter Ridge 32, Watauga 26
3AA - Weddington 42, Ledford 0
3AA - Asheville 33, Cuthbertson 7
3AA - A.C. Reynolds 65, Sun Valley 14
3A - Piedmont 31, Tuscola 17
2AA - Monroe 48, R-S Central 8
2AA - Forest Hills won by forfeit over Smokey Mountain
2A - Parkwood 35, Franklin 17
1A - Union Academy 12, South Stanly 0