Rivers threw for 166 yards and two scores to Keenan Allen and kept the Chargers’ offense on the field for nearly 39 minutes.
Stuck on the sideline most of the night, Manning ended up with 289 yards and only two touchdowns.
The Broncos (11-3) fell at home in the regular season for the first time in 14 games.
The Chargers (7-7) snapped Denver’s 10-game AFC West winning streak and stayed in the hunt for a playoff spot.
BEARS: Quarterback Jay Cutler is set to return to the lineup.
Coach Marc Trestman said Cutler will start Sunday at Cleveland after missing the previous four games with a high left ankle sprain.
Josh McCown, who played well in his absence, goes back to a reserve role.
REDSKINS: Offensive coordinator Kyle Shanahan says he wasn’t consulted on his father’s decision to bench Robert Griffin III and finds it’s “a little disappointing” that the franchise quarterback won’t be playing for the rest of the season.
Shanahan said Thursday he made out two game plans for this week at Atlanta while waiting for coach Mike Shanahan to announce that Kirk Cousins will start the final three weeks.
Said Kyle Shanahan: “I’m a coordinator. I don’t look at things the same way an owner does or a GM or a head coach. I don’t look at the future of franchise, I look at how the hell am I going to win on Sunday, and I would love to have our starting quarterback out there for the rest of the year.”
PACKERS: The Aaron Rodgers watch will continue for at least one more day.
Whether it stretches into next week likely will depend on what happens at Green Bay’s practice today.
Rodgers, who broke his collarbone on Nov. 4, took some snaps during 11-on-11 drills in Thursday’s practice, but still has not been medically cleared to play Sunday against the Dallas Cowboys.
“If I’m going to play Sunday, I’m going to need to take the majority of the reps tomorrow,” Rodgers said after Thursday’s practice.