There wasn't much value in being the favourite in the Divisional Round of the NFL playoffs.

Three of the four underdogs, the Cincinnati Bengals, San Francisco 49ers and Los Angeles Rams, prevailed to progress to Conference Championship weekend.

An incredible overtime win over the Buffalo Bills saw the Kansas City Chiefs, the sole favourite to prevail, join them in moving one game away from the Super Bowl.

Despite a victory in a game many have already labelled as the best playoff game of all time, the Chiefs' position in the Super Bowl odds by Stats Perform's rest-of-season projection has gone down, with the Rams leapfrogging them and taking their spot as the team most likely to lift the Lombardi Trophy on February 13.

So how has a week of action in which the Chiefs were victorious flipped the odds against Kansas City?

Hollywood ending in store for LA?

Rest-of-season or, in this case, postseason projection, projects every future game to give a predicted win percentage for each team across its remaining games. Rather than being a simulator of future games, the projections are calculated by looking at each team's quarterback and QB efficiency versus expected – performance in terms of yards added in expected passing situations – as well as team values for pass protection/pass rush, skill position players/coverage defenders and run blocking/run defense.

For the playoffs, the projection has been used to calculate each team's odds of winning a home game against every postseason team, with those predictions then used to forecast each franchise's chances of reaching and winning the Super Bowl.

Last week, prior to the Divisional games, the Chiefs were given a 27 per cent shot to win the Super Bowl for the second time in three seasons, just ahead of the Rams on 26.3 per cent.

Following their respective victories, the Chiefs are viewed as having a 37.84 per cent chance of taking the silverware back to Missouri. The more likely outcome, at least according to ROS, is that the trophy stays at SoFi Stadium with the Rams, whose odds of winning it for only the second time in franchise history have ballooned to 38.21.

It is not a huge margin between the two, but the change at the top is enough to raise eyebrows given how devastating the Chiefs were on offense in defeating the Bills.

But the Rams' position as the new Super Bowl favourite is more a reflection of the potential opponents, rather than a commentary on the merits of the respective teams.

Another nail-biter for the Chiefs

Kansas City already has experience of one nerve-shredding Super Bowl with an NFC West opponent, coming back from 20-10 down in the fourth quarter to beat the 49ers two years ago in Super Bowl LIV.

And ROS expects either a meeting with the Rams or a rematch with the Niners to be similarly tense.

The Chiefs would not be considered favourites in a home game with the Rams, Kansas City given just a 45.2 per cent chance to triumph.

That number improves significantly in a matchup with the 49ers, against whom the Chiefs have 58.2 per cent odds of winning a home game.

It is still not an overly decisive margin, however, and pales in comparison to the Rams' prospects of beating the alternative AFC representative, the Bengals.

Cincinnati would have just a 16.8 per cent shot of winning a road game with Los Angeles, and those odds improve to just 19.8 per cent in a home game.

In other words, while a close game likely beckons for the Chiefs regardless of who wins the NFC Championship Game, an upset win for the Bengals in Kansas City would make the Rams or the Niners (72.1 per cent home game, 67.2 per cent away game) clear favourites to win the Super Bowl on the neutral field site at SoFi Stadium.

The Bengals' status as rank outsiders even after making it this far is in part based on the struggles of an offensive line that ranked 25th in Stats Perform's pass protection win rate and allowed nine sacks in the Divisional Round win over the Tennessee Titans.

San Francisco (first), Los Angeles (second) and the Chiefs (15th) each ranked in the top half of the NFL in pass-rush win rate, meaning Cincinnati will be at a clear disadvantage in the trenches in the AFC Championship Game and in a potential Super Bowl matchup.

The 2021 NFL season has been full of surprises, but the numbers clearly point to the Rams playing in a home Super Bowl against the Chiefs. 

So, is everybody ready for Niners-Bengals?