Seahawks vs Cardinals Prediction Market Odds, September 20, 2026
| Spread | Total | ML | Best ML | |
|---|---|---|---|---|
â–¶Seahawks | -3.5 52%51% | O 41.5 50%49% | 66%66% | 66% Kalshi |
â–¶Cardinals | +3.5 48%49% | U 41.5 50%51% | 35%35% | 35% Kalshi |
| Spread | Total | Moneyline | Best ML | |
|---|---|---|---|---|
â–¶Seattle Seahawks | -3.5 | O 41.5 | 66% Kalshi | |
â–¶Arizona Cardinals | +3.5 | U 41.5 | 35% Kalshi |
No player props available for this game.
The Seattle Seahawks are a 66% moneyline favorite over the Arizona Cardinals on both Kalshi and Polymarket as of September 16, even though Arizona is the home team and both clubs are 1-0. The two books match on the winner, the spread ladder crosses even money between Seahawks -3.5 and -4.5, and the full-game total sits at 41.5. Kickoff is 4:25 PM ET on Sunday, September 20, at State Farm Stadium on FOX.
This is an early NFC West meeting between two unbeaten teams, and the market has picked a side. The Seattle Seahawks (1-0) opened with a 13-10 home win over the New England Patriots, and the Arizona Cardinals (1-0) won 26-14 at the Los Angeles Chargers. Arizona produced the bigger Week 1 margin and gets the home game, and the board still prices Seattle as a two-in-three road favorite. The game carries roughly $329,000 in cumulative volume across Kalshi and Polymarket.
Seahawks vs Cardinals Moneyline
As of September 16, the Seahawks trade at 66% on both Kalshi and Polymarket, and the Cardinals trade at 35% on both. There is no cross-platform gap on the winner: the books agree on each side, and the one-point overround (66 plus 35) is the only daylight. A 66% road favorite in a division game says the market is rating Seattle clearly ahead of Arizona and is not reading much into the Cardinals' 12-point win in Los Angeles.
The board has no captured snapshot history for this game yet, so there is no opening-to-current move to report. Treat these prices as a single reading taken on September 16, four days before kickoff.
Spread and Total
The full-game spread ladder, where both books quote, crosses 50% between two rungs. Seahawks -2.5 trades at 60% on both books, Seahawks -3.5 at 52% on Kalshi and 51% on Polymarket, and Seahawks -4.5 drops to 47% on both. That puts the market's median margin right around a field goal plus a point for Seattle, which fits a 66% moneyline. On the other side, Cardinals -1.5 (an Arizona win by 2 or more) trades at 33% on both books.
The full-game total centers on 41.5, where the over trades at 50% on Kalshi and 49% on Polymarket. Over 40.5 is 54% and 53%, over 42.5 is 45% on both, and over 44.5 falls to 40% on Kalshi and 39% on Polymarket. Kalshi's team totals line up with that: Seattle over 21.5 points trades at 53% and over 23.5 at 48%, while Arizona over 17.5 trades at 54% and over 20.5 at 40%. The market's central scoreline is in the neighborhood of Seahawks 23, Cardinals 19, a low-scoring game decided by about four points. That fits a Seattle team that allowed 10 points in its opener.
First Half Markets
Kalshi prices over 17.5 first-half points at 58% and over 20.5 at 46%, and Polymarket's first-half total of 19.5 trades at 53%, so the books expect roughly 19 to 20 points before halftime, a little under half of the full-game number. Kalshi has the Seahawks winning the first half by more than 2.5 points at 52% and by more than 3.5 at 45%, close to the full-game margin.
What the Market Is Weighing
The price is a vote on team strength over venue. Arizona is at home at State Farm Stadium and just scored 26 on the road, but the board gives the Cardinals only about a 35% chance to start 2-0. The division stakes are concrete: the winner goes to 2-0 overall and 1-0 in the NFC West, and the loser takes an early division loss. For the season-long view, see the Seattle Seahawks hub, the Arizona Cardinals hub, and the NFC West division market. Preseason win-total analysis for both teams is in our Seahawks win total piece and our Cardinals win total piece.
When the Seahawks vs Cardinals Market Resolves
The moneyline settles on the team that wins the game played on Sunday, September 20, 2026, at State Farm Stadium. Spread, total, and team-total contracts settle on the official final score once the game goes final, and first-half contracts settle on the halftime score. Each contract is settled on Kalshi and Polymarket under that platform's own rules after the result is official.
For the rest of the week's schedule, see today's NFL games and the NFL hub.
Resolution Criteria
The moneyline resolves to the team that wins the Seattle Seahawks at Arizona Cardinals game scheduled for Sunday, September 20, 2026, at 4:25 PM ET at State Farm Stadium. Spread, full-game total, and team-total contracts settle on the official final score; first-half contracts settle on the halftime score. Kalshi and Polymarket each settle their contracts under their own published rules once the result is official.
Key Factors
- Both teams are 1-0: Seattle beat New England 13-10 at home, and Arizona won 26-14 at the Chargers, yet the Seahawks are a 66% road favorite on both books.
- No cross-platform edge on the winner: Kalshi and Polymarket both price Seattle at 66% and Arizona at 35% as of September 16.
- The spread ladder crosses even money between Seahawks -3.5 (52% Kalshi, 51% Polymarket) and Seahawks -4.5 (47% on both).
- The full-game total centers on 41.5, with the over at 50% on Kalshi and 49% on Polymarket.
- Kalshi team totals point to roughly Seahawks 23, Cardinals 19: Seattle over 21.5 at 53%, Arizona over 17.5 at 54%.
- NFC West stakes: the winner of this 4:25 PM ET FOX game goes to 2-0 overall and 1-0 in the division.
What are the Seahawks vs Cardinals odds?
As of September 16, 2026, the Seattle Seahawks are 66% to win on both Kalshi and Polymarket, and the Arizona Cardinals are 35% on both. Check the live board on this page for current prices.
Who is favored in Seahawks vs Cardinals?
The Seahawks are favored on the road. A 66% price implies the market sees Seattle winning about two times in three, and the spread ladder crosses even money between Seahawks -3.5 and -4.5.
What is the total for Seahawks vs Cardinals?
The full-game total centers on 41.5 points, where the over traded at 50% on Kalshi and 49% on Polymarket as of September 16, 2026.
When and where is Seahawks vs Cardinals?
The game kicks off at 4:25 PM ET on Sunday, September 20, 2026, at State Farm Stadium, and it airs on FOX. It is an NFL Week 2 game.
Where can I trade Seahawks vs Cardinals?
The moneyline, spread, and total markets trade on both Kalshi and Polymarket. The game carries roughly $329,000 in cumulative volume across the two platforms.
When does the Seahawks vs Cardinals market resolve?
The moneyline settles on the winner once the September 20, 2026 game goes final. Spread and total contracts settle on the official final score under each platform's rules.