The Broncos came away with points on each of their first three possessions. With 11:59 left in the second quarter, they began their fourth drive.
On second down, quarterback Peyton Manning rolled to his left and was unable to find one of his initial looks. He threw the ball after rolling almost all the way to the side line, and wide receiver Andre Caldwell made a diving catch for an 18-yard gain.
Running back Knowshon Moreno ran it on the next three plays and gained 20 yards. Ronnie Hillman then picked up 6.
On the next play, Manning threw for wide receiver Matthew Willis in the end zone, but defensive back Phillip Adams laid out and made a diving interception.
The pick gave Oakland possession on its own 20 after the touchback.
The Raiders offense moved out to midfield with a 9-yard run by Darren McFadden, a 15-yard completion to Darrius Heyward-Bey and a 13-yarder to Rod Streater.
Oakland crossed midfield on a 10-yard first-down connection from quarterback Carson Palmer to wideout Demaryius Moore, who became the third Oakland receiver to catch a first-down pass on the possession.
Two plays later, Palmer went back to Streater for another first down to the Denver 26-yard line.
The next two plays were each 6-yard completions, one to Moore and one to McFadden to set Oakland up with a first down inside the red zone.
Facing a third-and-2 from 6-yard line, the Raiders took a timeout with 2:06 remaining in the half.
Coming out of the break, the Raiders lined up in a shotgun formation. Palmer faked a quick pass to his right and then hit McFadden to his left, who had a clear path to the end zone for a score.
The extra point made it 13-7 Broncos. Denver will take over inside the two-minute mark with three timeouts remaining.