San Francisco Top 25 high school football scores: Eight De La Salle players score in rout of Clayton Valley

Nation's No. 10 team extends NorCal unbeaten streak to 306; No. 2 Serra scores historic shutout in win over No. 3 Valley Christian; No. 11 St. Ignatius goes on road to beat No. 13 Mitty; Pittsburg outlasts Antioch 42-41 in BLG Classic.