Aztec receiver Matt Chidez returned the opening kickoff 70 yards to the end zone for what would have been Keppel's first points of the 2010 season, only to have a clipping penalty negate the play and prevent the points from being kept on the scoreboard.
The Aztecs (0-3) never recovered, allowing the Eagles (2-1) to take a 24-0 lead into halftime.
Gabrielino was led by Eddie Moreno, who amassed 185 rushing yards and ran for two touchdowns, including a 75-yard punt return late in the first quarter. Eagles quarterback Isaac Garcia added two touchdowns through the air.
In its first three games of the season, the Aztecs have been outscored 111-0. Friday's loss is its ninth consecutive dating back to last season, when the Aztecs ended a 40-game losing streak with a 36-0 victory over Mountain View High on Oct. 2, 2009.
Keppel returns home this week to host Baldwin Park's Sierra Vista Dons, who are undefeated. Almont League action begins on Oct. 15 with the Aztecs hosting Alhambra High at Aztec Field.