The 2017 NFL season is finally here and the biggest questions about every team remain.
But which teams are poised to make big plays and which ones are ready to make a comeback?
We take a look at the top defenses in the league.1.
New England PatriotsThe Patriots entered the 2017 season with their greatest question mark since they replaced Brady as head coach.
Brady was the NFL’s all-time leader in passing yards (2,897), touchdowns (40), passing touchdowns (39) and total offense (1,726).
However, Brady was also the league’s MVP (with 6,732 total yards and a career passer rating of 106.1).
Brady went on to become a three-time Super Bowl champion.
New England’s defense is arguably the most dynamic and talented in the NFL.
Led by defensive tackle Vince Wilfork, the Patriots have one of the league ‘s best pass rush units.
Wilfork and safety Devin McCourty are among the league leaders in sacks (27), hurries (17) and forced fumbles (3).
Wilfork is also the NFL ‘s top tackler with 6.5 stops per game and McCourt is second with 4.0.
Wilfson and McCourtys play a key role in New England’s run defense, which has been instrumental in the team’s success.
The Pats’ defense also leads the league in scoring defense, allowing an average of just 4.3 points per game.
The Patriots will need to replace some of the players who have helped their defense perform well, but they should be able to.2.
Seattle SeahawksAfter a solid season under coach Pete Carroll, the Seahawks made some big changes this offseason.
Cornerback Richard Sherman and safety Kam Chancellor were both released.
The Seahawks also signed free agent safety Earl Thomas and free agent cornerback Jeremy Lane.
The addition of free agent running back Marshawn Lynch will be a major boost for the offense.
Russell Wilson and Doug Baldwin will be key pieces for the Seahawks’ offense, while rookie running back Christine Michael should be an asset on special teams.
Seattle will need all of those players to have a big impact, but the defense should be a nice addition to the offense as well.3.
Pittsburgh SteelersThe Steelers had a solid regular season, finishing the season with an average win total of 10.5.
However, that could change this season as coach Mike Tomlin will look to add some quality depth.
Defensive tackle Ryan Shazier was released by the Steelers.
Steelers defensive tackle Kevin Dodd was also released, but he was not as active as Shaziers.
The Steelers also lost starting linebacker Ben Roethlisberger to a season-ending knee injury.
The team’s other offseason acquisition, safety Ryan Clark, was also cut.
Defensive end Ryan Clark has been an important piece for Pittsburgh’s defense, but will have to play at a high level for a full season.
The defense was a major factor in Pittsburgh’s playoff run this season.4.
San Diego ChargersThe Chargers struggled to win games this season, losing eight of their last 10 games and finishing with a record of 4-12.
The loss of starting wide receiver Keenan Allen to a torn ACL and the team sacking of head coach Anthony Lynn has put an end to that.
But there is still hope for the Chargers as they look to rebound this season and win their first playoff game since 2006.
The Chargers have a strong pass rush, led by outside linebacker Melvin Ingram.
The Chargers also have talented inside linebackers (Logan Ryan, Melvin Ingram and Dontari Poe) who are capable of playing at a Pro Bowl level.
The safety position is a major concern, with cornerback Jourdan Lewis and outside linebacker Justin Gilbert both out with injuries.5-6.
Chicago BearsThe Bears have been among the NFL teams to improve this offseason with the addition of wide receiver Alshon Jeffery and the signing of defensive tackle Gerald McCoy.
Jeffery was the league leading receiver with a career-high 1,719 yards.
He also led the league with 11 touchdowns.
Jefferies’ touchdown production was bolstered by the fact that he caught 54 passes for 865 yards and five touchdowns.
Chicago also added veteran linebacker Nick Kwiatkoski and cornerback Anthony Barr.
The Bears have some promising young players, but there is a long way to go to compete in the NFC North.6.
Kansas City ChiefsThe Chiefs defense is poised to take another step forward in 2017 with the signing a pair of top-flight defenders in edge rusher Justin Houston and cornerback Marcus Peters.
Houston is one of only two defensive players with at least 1,000 tackles and 1,200 pass deflections.
He and Peters were a dominant pair in the Chiefs’ secondary, allowing just 21 sacks and six interceptions during their 2016 campaign. Kansas