The Broncos started their second drive of the game on their own 12-yard line after a 66-yard San Diego punt.
Quarterback Peyton Manning started the drive with two consecutive completions to his tight ends, first to Jacob Tamme for 8 and then to Joel Dreessen for 5.
On the next play, Manning tried to hit wide receiver Matthew Willis on a short pass to his left, but linebacker Demorrio Williams deflected it up into the air. Safety Eric Weddle caught the deflection and returned it 23 yards for the touchdown.
The extra point made it 7-0, as the Broncos regain possession with seven minutes remaining in the first quarter.