East Ridge picked up its second win of the season with a steamrolling ground game that produced 466 yards rushing.
Alonzo Russell carried the ball seven times for 159 yards, while Kentrell Harris picked up 113 yards on five carries. Kashawn Cosey added 83 yards on four rushes.
Quarterback Eric Bennett completed 10 of 13 passes for 75 yards.
The Pioneer defense held Polk County (1-1) to 253 total yards.
East Ridge will travel to East Hamilton next Friday before hosting Brainerd on Sept. 8 at the new Raymond James Stadium.