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The primary participants in Denver's "No-Fly Zone" secondary—cornerbacks Aqib Talib, Chris Harris Jr., and Bradley Roby as well as safeties Darian Stewart and T.J Ward—have been frequent guests at the top of their positional charts all season in the NFL1000 rankings. The offense was hardly stellar in Denver's 20-10 win over the Jaguars on Sunday, but the defense, as usual, was on point. Roby had a pick-six of Blake Bortles to fill out the highlight reel, but Harris took the crown in our rankings, and he's the top cat among all players in the Week 13 edition of the NFL1000.

As usual, Harris was outstanding in coverage, both outside and in the slot. When Harris covered inside, Bortles targeted him five times, and he allowed only three receptions for 25 yards. Outside, Bortles found nothing when targeting Harris, as he completed zero passes on four targets. Allen Robinson's inability to hold onto the ball on a deep boundary route helped keep that tally clean, but Harris snapped the ball away from Robinson late in the first half. The undrafted Kansas alum has turned himself into one of the game's great pass-defenders over the years. From multi-positional coverage to route-reading to run defense, there isn't anything he can't do at a high level.

Roby, who faces a ton of targets for a third cornerback because quarterbacks would prefer to avoid Talib and Harris, ranked 45th overall this week and allowed one catch for 12 yards on five targets, as well as the aforementioned pick-six. Halfway through the third quarter, he did a great job of establishing inside position on a short drag route, and when Bortles missed the read under pressure, Roby was on his way for the 51-yard score.

The Broncos are still trying to figure out their quarterback situation, but Wade Phillips has their defense playing at the same Super Bowl-caliber level it did in 2015. Most impressive is how new defenders keep popping up and excelling. This week, our top inside linebacker is Denver's Todd Davis, who has jumped from going undrafted in 2014 to his current role as a key part of the front seven. Davis looked great no matter his assignment—he run-blitzed with aplomb, sifted through blockers to bring down Jacksonville's running backs, and looked agile and rangy in coverage. He finished his day with five tackles, five stops and one quarterback hurry.

It's a tribute to Denver's defensive coaching staff that so many unheralded players have become stars in this system.

Part of Bleacher Report's NFL1000 player rating methodology is the ability to look at our grades from week to week (as you, dear reader, can) and suss out which patterns are turning into trends and which are flukes in the relatively small sample size of an NFL season.

There are many ways to dissect and learn from what the NFL presents on the field every week, and the NFL1000 goes as deep as any to tell you what's going on out there.

With a 17-person crew of experienced evaluators, we'll comb through the game tape each week to bring you concise, clear evaluations of every player in the NFL. We'll tell you which rookies are rising and which undrafted players are coming out of nowhere to make an impact. We'll tell you which players are falling in performance and why.

There is no predetermined narrative with these grades. No mysterious "clutch factor." No tweaked-out quarterback ratings that defy explanation. Our grades are based on pure scouting, and lots of it. We grade the key criteria for each position based on a series of attributes and add in a score for positional importance.

In the case of a tie, our scouts ask, "Which player would I want on my team?" and adjust accordingly.

Is it a subjective process? Of course—that's what scouting is, and as we like to say, ties are no fun.

Each player is evaluated and graded by our crack team of scouts, who possess more than 100 combined years of experience in playing, front-office work, coaching and media. Cian Fahey, John Middlekauff, Marcus Mosher, Mark Schofield, Duke Manyweather, Ethan Young, Joe Goodberry, Justis Mosqueda, Charles McDonald, Zach Kruse, Derrik Klassen, Jerod Brown, Ian Wharton, Kyle Posey, Mark Bullock, Chuck Zodda and Doug Farrar have watched tape for months to bring you these grades, and we'll be bringing you player grades based on the game action every week.

Here are the NFL1000 player grades for Week 13 of the 2016 NFL season.

All advanced stats are courtesy of Pro Football Focus.