Power Rankings: No. 2 Denver Broncos

A weekly examination of the Broncos’ ESPN.com Power Ranking:

Preseason: 3 | Last week: 3 | ESPN.com Power Ranking since 2002

In their first outing since head coach John Fox's open-heart surgery, the Denver Broncos showed some composure on the road and once again flashed their record-setting offense in a 28-20 victory over the San Diego Chargers as they moved up a spot in the ESPN.com Power Rankings.

While the Broncos scored a season-low 28 points in the win, they are averaging just over 41 points a game this season. The biggest concern heading into this week's matchup with the 9-0 Chiefs -- the No. 1 team in the Power Rankings -- is the health of quarterback Peyton Manning.

Manning aggravated a right ankle injury in the closing minutes of Sunday's win, and if he's hurt, there is always a possibility the Broncos offense gets a severe limp. Backup Brock Osweiler is expected to get some work with the starters in practice this week as Manning is expected to miss some practice time. But he is expected to play Sunday night against the Chiefs.

Overall, interim coach Jack Del Rio had a prepared team in San Diego that performed well in all game management areas.

"It's an honor to be given the responsibility," Del Rio said. "I love coaching ball. I love ... working with players and helping them be better. I'm just trying to do my part. I'm really just a defensive coordinator for Coach Fox and when he's healing I'm just doing a few more things, that's the way I'm looking at it."