Denver Broncos vs Kansas City Chiefs — Win Probability

KC's 21-Point Win Far Exceeds Tight Model Projection

Kansas City's 31-10 victory over Denver came as a substantial deviation from what the Matrix model projected pregame, though the direction of the outcome aligned with expectations.

The model favored Kansas City with a 58% win probability and projected a tight game: KC 23, Denver 20.5, for an expected margin of 2.6 points. The market's betting line agreed on direction but was nearly identical in magnitude—KC favored by 2.5 points. Both the model and the market saw this as a coin-flip matchup.

What actually unfolded was decisively different. Kansas City won 31-10, a 21-point margin that obliterated the projected 2.6-point gap by 18.4 points. This represents a significant miss in precision, even though the model correctly identified KC as the likely winner.

The gap between projection and reality breaks down as follows: Kansas City scored 8 more points than expected (31 vs. 23), while Denver scored 10 fewer than expected (10 vs. 20.5). The cumulative swing—both teams performing well outside the envelope—drove the outsized final margin.

This was not a borderline miss. An expected 2.6-point KC win that became a 21-point blowout indicates the model underestimated the performance differential between these teams. Neither the model nor the market anticipated Denver's offensive collapse or Kansas City's decisive execution.

For a game where pregame win probability sat at 58-42, the actual result—a dominant, one-sided victory—represents a larger miss than the win-probability metric alone would suggest. The model called the right team but missed substantially on game script and final margin.