The theme so far of Week 1 of the NFL season is the Week of the Comeback. Nine teams came back from improbable odds (a win probability of approximately 20 percent or lower) to win their games. But which comebacks were most impressive? Let’s rank them using that win probability stat.

1. Chiefs 33, Chargers 27 (OT)

Chiefs’ win probability bottomed out at 0.3 percent

The Chiefs scored their biggest regular-season comeback in franchise history, overcoming a 21-point deficit to win. The game turned with the Chargers up 17 and 6:25 left in the fourth quarter (at which point the Chiefs chance to win was 0.3 percent) when the Chiefs converted a 4th-and-2 with a short pass. Alex Smith then hit his next three passes, the third a touchdown throw to Jeremy Maclin that got the Chiefs to within 10.

2. Raiders 35, Saints 34

Raiders’ win probability bottomed out at 3.6 percent

Though the story of the game was the gutsy play-calling of Jack Del Rio at game’s end, it’s important to note just how improbable the overall comeback was.

The Raiders had that 3.6 percent chance to win at the start of the fourth quarter, but things got better quickly. The Saints were in Raiders’ territory, but managed only five yards on three plays and missed a 50-yard field goal. Two plays later, Derek Carr hit Amari Cooper for 43 yards and followed that up with a throw to Michael Crabtree for 25 more. A touchdown made it a one-score game.

3. Broncos 21, Panthers 20

Broncos’ win probability bottomed out at 8.5 percent

The Panthers’ held a 17-7 lead for the entirety of the third quarter, and the Broncos’ win probability hit bottom with just under six minutes remaining when they punted the ball back to the Panthers. Things changed on the first play of the fourth quarter when Trevor Siemian’s threw a touchdown pass to C.J. Anderson. The Broncos went on to outscore the Panthers 14-3 in the fourth quarter en route to the first of several one-point wins this week.

4. Seahawks 12, Dolphins 10

Seahawks' win probability bottomed out at 9.2 percent

The Dolphins' chance of winning was better than 90 percent late in the fourth quarter, when the Seahawks faced a 4th-and-1 from their own 34. But they hit that one and converted another fourth down later in the drive, before netting the go-ahead score on Russell Wilson's pass to Doug Baldwin. That proved to be the game-winner.

5. Bengals 23, Jets 22

Bengals’ win probability bottomed out at 15.3 percent

The Jets looked like they were going to run away with this game early. They had a 7-0 lead and a first-and-goal with just under five minutes to play in the first quarter, putting their chances of winning at almost 85 percent. Nick Folk’s 22-yard field goal was blocked, indicating this game wasn’t going to be quite so easy. It wasn’t. The Jets led 22-20 late, but Mike Nugent’s field goal proved to be the winning score against his former team.

6. Vikings 25, Titans 16

Vikings’ win probability bottomed out at 15.8 percent

The Vikings trailed by 10 points at the start of the third quarter and had only a 16 percent chance of winning at that point. But a 61-yard kickoff return by Cordarrelle Patterson to start the second half changed the tone of the game. By the end of the third quarter, they had the lead and control of the game.

7. Giants 20, Cowboys 19

Giants' win probability bottomed out at 18 percent

The Giants trailed by six points with just under 12 minutes remaining, and the Cowboys had the ball, with an 82 percent chance of winning. But rookie quarterback Dak Prescott couldn't finish the job. The Giants rallied and won on a touchdown pass from Eli Manning to Victor Cruz.

8. Lions 39, Colts 35

Lion's win probability bottomed out at 19.5 percent

After Adam Vinatieri's go-ahead field goal, the Lions found themselves 75 yards from the end zone and with a chance of winning of just below 20 percent. But having Matt Prater on your side improves those odds. After three completions, Prater nailed the game winner from 43 yards away, making him 10-for-10 on game-tying or go-ahead field goals in the final 10 seconds of regulation or any point in overtime.

9. Texans 23, Bears 14

Texans’ win probability bottomed out at 20.2 percent

A score and a quick stop put the Bears in good position, with nearly an 80 percent chance to win 11 minutes into the game. This one turned into a back-and-forth affair, with the lead changing multiple times, the Texans getting the last two scores to pull away in the fourth quarter.