LIVERMORE -- Running back Eric Haynes carried 23 times for 118 yards and scored two touchdowns as the undefeated Broncos won their third straight game. Quarterback Kyle Austin threw a touchdown pass for Northgate (3-0).
Andre Kasten ran 14 yards for a touchdown late in the third quarter for the host Cowboys (1-2).
The Broncos scored two touchdowns in each of the first two quarters. Haynes scored on a 5-yard run on Northgate's first possession of the game and Austin threw a 40-yard TD pass to Jake Smith with 5:28 left in the period.
Haynes scored his second touchdown on a 1-yard run with 11:01 left in the second quarter and Matt Huang scored on a 37-yard run with 4:58 left.
The Cowboys' best chance to score in the first half came in the second quarter when quarterback Travis Adams led his team on a six-play, 44-yard drive to the Northgate 23, but a fumble ended the threat with 7:56 left in the second period.
Haynes gained 88 yards on 16 carries in the first half.