Connor Montgomery rushed for 221 yards to lead Firth to a 41-40 Nuclear League victory over Salmon on Friday night.
The Cougars (6-1, 3-0) led 20-0 early and had a 27-19 halftime lead.
Salmon quarterback Jedd Tibbitts led the Savages back with three rushing touchdowns and one through the air but Firth hung on for the win.
The Cougars will be at North Fremont on Friday.
FIRTH 41, SALMON 40
Score by quarter unavailable.
RUSHING--Firth: Connor Montgomery 23-221, Nick Andersen 7-17, Jackson Thompson 10-24, Dalton Cate 2-1. Salmon: unavailable.