Market Spread & Probability Impact
10,000 iterations computedMonte Carlo Margin of Victory Distribution
| Qtr | Possession | Drive Play Count & Yardage | Key Event / Scripting | Drive Result |
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Vegas Quarterback Replacement Value Science
In modern NFL handicapping, the drop-off from a high-efficiency dual-threat franchise quarterback (such as rookie phenomenon Jayden Daniels) to a backup (Marcus Mariota) represents one of the largest single-variable adjustments on the betting board.
While an elite tackle is worth ~0.5 to 1.0 point, and an All-Pro wide receiver accounts for ~1.0 to 1.5 points, starting quarterbacks swing point spreads between 3.5 and 7.5 points. In Washington's scheme, Daniels' designed QB rush rate (24%) and scramble EPA (+0.38 per attempt) cannot be replicated, forcing offensive coordinator Kliff Kingsbury toward conservative two-tight-end sets and elevated run rates on 2nd-and-long.
Frequently Asked Questions
Why did Seattle move from underdog to -4.0 favorite?
The original opening line was Washington -1.5 with home-field advantage (+1.5 pts). With Daniels ruled out, Washington receives a -5.5 point QB downgrade penalty, shifting the true neutral rating from WAS +0.5 to WAS -5.0. Net outcome: Seattle becomes a 4-point road favorite.
How does the model calculate win probability from spread?
The model maps the adjusted spread into a standard normal cumulative distribution function (CDF) calibrated against 20 years of NFL margin-of-victory data with a standard deviation σ ≈ 13.85 points, accounting for field goal clusters at 3, 6, and 7.
What impact does Sam Darnold clearing concussion protocol have?
Darnold's removal from the Seahawks' injury report protects Seattle from a -4.5 point downgrade to backup Drew Lock. Seattle maintains their full offensive efficiency baseline (0.12 EPA/dropback), creating a +0.26 EPA differential per passing play over Washington's backup scheme.