Chiefs vs. Buccaneers
Crossbook compares what two exchanges, Polymarket and Kalshi, charge for the same event, and publishes a permanent scored record of its own forecasts under published rules.
Tracked on one venue, with Crossbook's own call on the record.
Crossbook forecast
- 41.0%against a market price of 31.5% at the timeNO
Logged 18 Aug 2026, 02:44 UTC · Brier 0.1681
- An Aug 22, 2026 date places this in preseason week 3, where starters play minimally and outcomes are driven by depth-chart randomness, so any strong prior about either team's quality is mostly narrative, not signal.
- Andy Reid's Chiefs have historically been mediocre in preseason play, and if Tampa Bay is the home team the base rate alone puts Kansas City in the low-to-mid 40s.
- My independent estimate (~41%) sits above the market's 31.5%; the gap plausibly reflects bettors pricing in expected starter rest for Kansas City or simply thin liquidity ($29k volume) rather than hard information, so I shade toward but do not fully adopt the market.
What would change it: Confirmed reports that the Chiefs will sit their top depth-chart units while the Buccaneers play theirs would push my estimate toward or below the market price.
Settlement source
Context
Polymarket prices this at 37%. No verified equivalent is currently listed on the other venue, so there is no cross venue comparison on this page.
Volume over the last 24 hours is modest, at about $6,411 on the busier venue.
This market has settled. The page is kept as a record of what the market said while the question was open, and of what Crossbook called.
Related markets
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