BY BRIAN HAMILTON LOUDON – Gatlinburg-Pittman hung tough with Class 3A No.3-ranked Loudon for most of the game, trailing by just one score late in the third quarter, but ultimately mistakes would cost the Highlanders in a 43-22 loss on Thursday Night Rivals. “The defense played extremely well all night long,” Gatlinburg-Pittman head coach Brad Waggoner said. “We got it into the fourth quarter (almost) at 22-14 and we knew we couldn’t give up big plays at the end. They’ve got explosive players and we knew that coming in.” Gatlinburg-Pittman took an early 7-0 lead on a 7-yard Levi Hill …