Here are some of the scores from high school football NCS playoff action on Friday night.
A pair of number two seeds lost while two number seven seeds advanced.
De La Salle 70 Freedom 7
The top seeded Spartans ran all over the eighth seeded Falcons from the beginning. They held a 42-0 lead at the half and led 56-0 after three periods.
Freedom didn't score until they returned a kickoff midway through the fourth quarter.
De La Salle, which hasn't lost to a Northern California team since 1991, is now 10-1 on the season. Their only loss was to a nationally ranked Florida team.
Next weekend, the Spartans will play the winner of tomorrow night's Berkeley High vs. Pittsburg High game.
Freedom, whose only previous loss was to Pittsburg High, finishes the season at 10-2.
San Ramon Valley 28 James Logan 14
The seventh seeded Wolves got ahead early against the second seeded Colts. They led by a 21-7 margin in the third quarter.
Logan closed the gap with a touchdown in the fourth period to make the score, 21-14.
However, San Ramon Valley put the ball in the end zone with less than four minutes to play to secure the win.
San Ramon Valley is now 9-3 on the season. Next weekend, they will play the winner of tomorrow night's Monte Vista High vs. San Leandro High game.
Logan High finishes the season at 10-1.
Concord 42 Las Lomas 16
The second seeded Knights fell behind early against the seventh seeded Minutemen.
Concord used a strong rushing attack to build a 28-10 lead in the third quarter and keep pouring it on, building a 42-10 margin midway through the fourth quarter.
Concord is now 9-3 on the season. Next weekend, they play the winner of tomorrow night's Rancho Cotate vs. Casa Grande game.
Las Lomas finishes the season with a 9-3 record.
Windsor 28 Maria Carrillo 6
Windsor, the division's top seed, is now 12-0 on the season. Next weekend, they play the winner of tomorrow night's College Park High vs. Dublin High game.
Maria Carrillo, the eighth seed, finishes the season at 6-6.
Fortuna High 37 Berean Christian 20
The third seeded Huskies fell behind early against the sixth seeded Eagles.
Berean Christian held a 20-14 edge in the third quarter. However, Fortuna got a safety and then the go-ahead touchdown early in the fourth quarter.
Fortuna is now 11-1 for the season. They play the winner of tomorrow night's Ferndale High vs. Willits High game.
Berean Christian, a small school in Walnut Creek, finishes the season at 8-4.
For more scores, go to the Contra Costa Times prep sports web site.