There are now 3 heavy favorites to win the Super Bowl

After four weeks of the NFL season only seven teams still have a legit shot to win the Super Bowl, but there are three teams that stand out above the rest.

Using Nate Silver's "2015 NFL Predictions," a model that rates each team and then projects how the regular season and playoffs will play out, we can get a better sense of which teams are the true Super Bowl contenders.

Heading into Week 5, the New England Patriots are still the favorite with a 19% chance to win the Super Bowl. However, the Green Bay Packers (17%) and Denver Broncos (14%) have narrowed the gap. The Patriots and Packers are also already nearly a lock for the postseason as both have a 94% chance to make the playoffs.

In all, there are now seven teams with at least a 5% chance of winning the Super Bowl after four weeks:

1. New England Patriots, 19%
2. Green Bay Packers, 17%
3. Denver Broncos, 14%
4. Seattle Seahawks, 7%
5. Cincinnati Bengals, 7%
6. Carolina Panthers, 6%
7. Atlanta Falcons, 5%

The Arizona Cardinals (4%), Pittsburgh Steelers (3%), and Dallas Cowboys (3%) just missed the cut and were the only other teams given more than a 2% chance of winning it all.

At the other end of the spectrum, there are now three teams without a legit shot to make the playoffs. The Chicago Bears (4%), Tampa Bay Buccaneers (3%), and Cleveland Browns (2%) all have less than a 5% chance to make the playoffs. The Miami Dolphins (5%) are not far behind.

Here are the 8 teams with the best chance to win each division:

• AFC East - New England Patriots, 80% chance to win their division
• AFC North - Cincinnati Bengals, 67%
• AFC South - Indianapolis Colts, 53%
• AFC West - Denver Broncos, 80%
• NFC East - Dallas Cowboys, 39%
• NFC North - Green Bay Packers, 88%
• NFC South - Atlanta Falcons, 56%
• NFC West - Seattle Seahawks, 49%

You can see the full projections at Five Thirty Eight.