SAN DIEGO (AP) - Antonio Gates caught a 15-yard touchdown from Philip Rivers, Nick Novak kicked a 32-yard field goal and the San Diego Chargers took a 10-0 lead over the Denver Broncos after a sloppy first quarter Monday night.

Two Denver fumbles led to both San Diego scores. Broncos wide receiver Trindon Holliday, claimed off waivers from Houston last week, dropped a punt return to kill their second possession of the game. The Chargers recovered to set up Novak's field goal at 9:03.

Rivers was under heavy pressure and made some errant throws early while San Diego's running game stalled. But another Broncos' miscue set up his TD pass to Gates at 8:23.

Omar Bolden fumbled a kickoff return and the Chargers recovered, leaving Broncos quarterback Peyton Manning shaking his head. The Broncos are 0-2 on the road in Manning's first season since leaving Indianapolis.

Manning was 3 of 4 for 17 yards in the quarter, while Rivers was 6 of 11 for 87 yards and the TD.

The Chargers dominated the ball for 11:15 of the quarter compared to the Broncos' 3:55.