Hillers up record to 5-0 as Cavers lose two players to injury under the lights at Balboa Stadium.
Nearly 9,200 general admission tickets remained as of Thursday, which was too many to allow for a 24-hour extension.
The Scotties could not overcome four costly turnovers, as the Dons defense and special teams stepped up big.
The Foothillers improved to 3-0 on the season with a 48-25 win.
Grossmont High QB DeSean Waters will enroll at Bemidji State in Minnesota.
Foothillers mount late comeback against Granite Hills High School, but lose in second round of CIF playoffs at La Jolla High School.
Wes Chandler now dedicates his days to several special causes.
Senior says of his Helix teammates, heading into Division II playoffs as top seed: "I want them all to get rings, and I want to be part of that."
Grossmont is blanked 51-0 as the Cougars run up their biggest margin of victory ever.
The unbeaten Foothillers want to stay that way but visiting Valhalla plans to make it difficult.