Three of the four teams remaining in the NFL playoffs — a win away from the Super Bowl — ranked within the top four defensively in yards per game allowed this season. The other is the defending-champion New England Patriots, who of course were expected to reach yet another AFC Championship game, thanks to Tom Brady and Bill Belichick.
Somewhere between this field, losing their 2017 hopes at a deep playoff run to injuries, suspensions, and just poor execution at times, are the Dallas Cowboys. The Cowboys ranked eighth in yards allowed per game at 318.1 this season.
On the surface, all this provides hope that typically springs eternal around the league through the offseason.
It has been far too long since the Cowboys defense matched the skill level of the team's offense, but Rod Marinelli's unit (not exactly by design) outplayed that of Scott Linehan's at times through this 9-7 campaign.
This defensive rebuild in Dallas began with the admission that this group had reached their ceiling in the offseason, as the Cowboys let long-time starters like CB Morris Claiborne, CB Brandon Carr, S Barry Church (now with the Jaguars), and S J.J. Wilcox go in free agency.
For a team with Super Bowl aspirations, looking to turn over an entire secondary in a division featuring Carson Wentz, Eli Manning, and Kirk Cousins as quickly as the Cowboys did was a risky move. Their confidence in hitting on draft picks paid off though.
The Cowboys' bright future is predicated on the likes of CB Chidobe Awuzie, CB Jourdan Lewis, and S Xavier Woods.
With two young starters at cornerback, the sky truly is the limit the this Cowboys defense. And they'll play in support of an offense with more than enough talent to return to form in 2018.
As it stands now under Rod Marinelli, the Cowboys defense is built to keep everything in front of them, and get bodies to the football. This coverage-friendly approach could be taken to new heights with Lewis and Awuzie on the outside, along with Anthony Brown finding a home in the slot. All three cornerbacks have excelled at using their speed, length, and technique to get their hands on passes.
Of course, games are won in the trenches, where the idea of the Cowboys defensive line ever rising to the level of their offensive line was laughable until recently. Whether it's with the franchise tag or a long-term extension, sack-artist DeMarcus Lawrence looks to be an all-important member of this entire team moving forward.
A healthy Lawrence was a nightmare for opposing right tackles in 2017. He earned a national spotlight each week on his way to the quarterback 14-and-a-half times. Making it look easy at times, Lawrence is a refined rusher with the speed and power to win inside and out.
The RDE position remains a sore spot in need of talent as this Cowboys defense looks to take the next step, but there's hope for the likes of Randy Gregory, Charles Tapper, and Taco Charlton to get the job done, along with veteran starter Tyrone Crawford.
With Crawford at RDE for much of 2017, running the ball against the Cowboys front was a tall order. His ability to capture the corner against left tackles came as a pleasant surprise to many, and once in position, the defensive captain chased down plenty of plays.
Tyrone Crawford wasn't the only pleasant surprise on the Dallas Cowboys defensive line this season.
Rookie Taco Charlton looked like an entirely different player to close a first year in Dallas that began with completely uninspiring results. Charlton — having the physical traits to play at the next level — was never a question out of Michigan.
He may never be a player to take over games for a defense, which the Cowboys couldn't have expected to find at DE selecting 28th overall, but an improved player at DE and DT could be an incredibly valuable asset for the Cowboys in 2018 and beyond.
This leaves the Cowboys linebacker corps, where we find the best example of young potential on the entire defense. Amazingly playing in all 16 games, LB Jaylon Smith is in line to take a massive step forward in year two.
Smith closed his season looking enticingly close to the player he was at Notre Dame, an encouraging sign as the Cowboys look to become less dependent on Sean Lee on this side of the ball.
Lee and Smith paired together would give the Cowboys a middle-of-the-field presence to rival the best in the league. Both players have exceptional range and awareness to run down plays from sideline to sideline.
Anthony Hitchens, an impending free agent, is another valuable piece at LB with his ready ability to play all three positions at a relatively high level.
Stefon Diggs racing to the end zone with no time left to send the Vikings to the NFC Championship game will be the lasting image of this past Divisional Round weekend, an offensive play that will live on forever.
A closer look at these games and the teams that survived them reveals a collective trust in defenses, a trust the Cowboys could be blissfully close to with their own young defense.
The Cowboys are likely losing one of the smarter minds behind their defense in recent years, with Matt Eberflus ticketed for Josh McDaniel's staff, and are still in need of a secondary coach after not retaining Joe Baker. In a league where better talent typically prevails though, the possibility of the Cowboys building a championship defense for next season and beyond may not be far off.
With defenses in Jacksonville and Philadelphia providing the hope that both teams can pull off the impossible and reach the Super Bowl on Sunday, will defensive potential be enough for Dallas to get through this long offseason and start the even longer path back to their first NFC Championship game in 21 seasons?