Power Rankings: No. 2 Denver Broncos

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

Preseason: 3 | Last week: 2 | ESPN.com Power Ranking since 2002

The Denver Broncos are one of two 11-win teams in the league, they have scored a league-high 515 points -- 158 more points than the next-highest team -- they are coming off their third 50-point game of the season (the first team to have three in the same year since the '69 Minnesota Vikings) and they still remain at No. 2 in ESPN.com's Power Rankings this week.

The Broncos also kept their grip on an AFC West title and currently have the No. 1 seed in the race for home-field advantage in the AFC after a 51-28 victory over the Tennessee Titans.

It was quarterback Peyton Manning's seventh game of the season with at least four touchdown passes, and he wasn't sacked and did not throw an interception in the game. And with kickoff temperature at 18 degrees, it gave Manning a tidy little forum to show he can throw in the cold.

The most pressing question in the big picture for the Broncos, and likely the question that kept them at No. 2 this week behind the Seattle Seahawks, who lost at San Francisco on Sunday, comes with their defense. The defense has surrendered at least 17 points in every game this season, and is 25th in points allowed per game (26.5) and 29th in passing yards allowed per game (274.3).

The Broncos have juggled the lineup some on defense, moving veteran linebacker Paris Lenon into the mix as well as second-year defensive back Omar Bolden at safety as they search for some answers on that side of the ball.

Or as coach John Fox put it earlier this week: "We're not satisfied at this point. There's room for improvement and I'm not ashamed to say it."