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Chiefs vs Seahawks Sunday Night OddsSpread, Line and Prediction Market Prices

Kansas City is thin at receiver for Sunday night. Rashee Rice is looking at a multi-week absence with a hamstring injury, and Tyquan Thornton will miss 12 to 16 weeks after ankle surgery. Reports have the Chiefs reaching out to free agent Tyreek Hill, which could change the picture before kickoff. Seattle may get Zach Charbonnet back from the PUP list, with the running back given a legitimate chance to play in this game. Traders have the Seahawks at 55% to win with the spread at Seahawks −2.5. This game has drawn $118K in volume in the past 24 hours.

Who wins?
55%Seattle Seahawks

About even (−121)

Prices to buy now. $100 on Kalshi at the ask pays $181 if correct, before fees.

The upset
45%Kansas City Chiefs

About 2 in 5 (+123)

Prices to buy now. $100 on Polymarket US at the ask pays $222 if correct, before fees.

Spread and total
SEA −2.5O/U 42.5

Kalshi's lines closest to a coin flip

Kansas CityChiefs5-0 · Away
+123
PreviewSun · 8:20 PM ETNBC · Lumen Field
SeattleSeahawks3-3 · Home
−123
45%ChiefsSeahawks55%
Chance to win, from Kalshi and Polymarket US

Best price to buy

Fees included
Buy Seahawks at 55¢on Kalshi · pays $1 if they win

Ranked by price with each venue’s taker fee on one contract. Polymarket’s international site isn’t open to US traders, so it’s never marked best.

NFL Week 7 · Sun, Oct 25 · 8:20 PM ET

Chiefs vs. Seahawks moneyline odds

Upcoming

Prices to buy each team. Tap a price to open Kalshi and Polymarket US.

Kansas City Chiefs at Seattle Seahawks: moneyline on Kalshi and Polymarket US, observed Oct 19, 12:30 PM ET
TeamAverageKalshiPolymarket USSources
Seattle SeahawksHome · −12155%
$100 on Kalshi at the ask pays $181
Kalshi55¢Polymarket US55.3¢
Kansas City ChiefsAway · +12345%
$100 on Polymarket US at the ask pays $222
Kalshi46¢Polymarket US45¢

Best prices to buy: Seattle at 55¢ on Kalshi; Kansas City at 45¢ on Polymarket US. Buying both costs exactly the $1 payout: no arbitrage. Traded in the past 24 hours: $111K on Kalshi and $8K on Polymarket US.

Kalshi: OpenPolymarket US: Open Average is the mean of each venue's price for the outcome, where it lists one: the midpoint of Kalshi's bid and ask; Polymarket US's displayed price. Source: Kalshi / Polymarket US via DeFi Rate, observed Oct 19, 12:30 PM ET.

Price history · Kalshi daily closeOct 13 – Oct 18
40506047%53%
ChiefsSeahawks

Source: Kalshi daily close via DeFi Rate, Oct 13 to Oct 18 (UTC days). A day without a close is left out.

Spread & total · Kalshi and Polymarket US

Chiefs vs. Seahawks spread and over/under

Kalshi and Polymarket US price a ladder of margins and totals: tap a price to buy that line. The line closest to a coin flip is tagged.

Seahawks win by more than…

Prices to buy Yes on each line, on each venue; ✓ marks the lowest ask. Fair odds: the line's chance (the midpoint of the bid and ask, or the last trade) as American odds, before fees. The Yes price beside it is what a contract costs to buy, so it sits above the chance when the bid and ask are far apart.

Spread ladder on Kalshi and Polymarket US: the lines closest to a coin flip
Seahawks byFair oddsKalshiPolymarket USSources
2+ pts−111Kalshi53¢Polymarket US52.5¢
3+ pts Coin flip+106Kalshi49¢Polymarket US48.5¢
4+ pts+147Kalshi41¢Polymarket US41.5¢
5+ pts+160Kalshi41¢Polymarket US39¢
6+ pts+174Kalshi39¢Polymarket US37¢
All 24 spread lines

Prices to buy Yes on each line, on each venue; ✓ marks the lowest ask. Fair odds: the line's chance (the midpoint of the bid and ask, or the last trade) as American odds, before fees. The Yes price beside it is what a contract costs to buy, so it sits above the chance when the bid and ask are far apart.

Total points over…

Prices to buy Yes on each line, on each venue; ✓ marks the lowest ask. Fair odds: the line's chance (the midpoint of the bid and ask, or the last trade) as American odds, before fees. The Yes price beside it is what a contract costs to buy, so it sits above the chance when the bid and ask are far apart.

Total points ladder on Kalshi and Polymarket US: the lines closest to a coin flip
OverFair oddsKalshiPolymarket USSources
Over 40.5−127Kalshi57¢Polymarket US56¢
Over 41.5−111Kalshi53¢Polymarket US53¢
Over 42.5 Coin flip+102Kalshi50¢Polymarket US49¢
Over 43.5+122Kalshi46¢Polymarket US46¢
Over 44.5+138Kalshi43¢Polymarket US42.5¢
All 19 total lines

Prices to buy Yes on each line, on each venue; ✓ marks the lowest ask. Fair odds: the line's chance (the midpoint of the bid and ask, or the last trade) as American odds, before fees. The Yes price beside it is what a contract costs to buy, so it sits above the chance when the bid and ask are far apart.

Total points ladder on Kalshi and Polymarket US: every line
OverFair oddsKalshiPolymarket USSources
Over 21.5−1718Kalshi97¢Polymarket USNot listed
Over 24.5−1076Kalshi94¢Polymarket USNot listed
Over 27.5−700Kalshi90¢Polymarket USNot listed
Over 30.5−488Kalshi86¢Polymarket USNot listed
Over 33.5−326Kalshi78¢Polymarket US78¢
Over 36.5−213Kalshi70¢Polymarket USNot listed
Over 39.5−147Kalshi61¢Polymarket US61¢
Over 40.5−127Kalshi57¢Polymarket US56¢
Over 41.5−111Kalshi53¢Polymarket US53¢
Over 42.5 Coin flip+102Kalshi50¢Polymarket US49¢
Over 43.5+122Kalshi46¢Polymarket US46¢
Over 44.5+138Kalshi43¢Polymarket US42.5¢
Over 45.5+153Kalshi41¢Polymarket US41¢
Over 48.5+208Kalshi34¢Polymarket US33.5¢
Over 51.5+292Kalshi28¢Polymarket US32.5¢
Over 54.5+388Kalshi23¢Polymarket USNot listed
Over 57.5+614Kalshi18¢Polymarket US17¢
Over 60.5+953Kalshi12¢Polymarket USNot listed
Over 63.5+1438Kalshi9¢Polymarket USNot listed

Open Chance is the midpoint of Kalshi's bid and ask. Fair odds are that chance as American odds, before fees. Polymarket US lists one team’s spread both ways: an underdog line there is bought as No on the favorite’s line. Source: Kalshi and Polymarket US via DeFi Rate, observed between Oct 19, 10:43 AM and 12:32 PM ET.

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Source: DraftKings Predictions / Gemini / Kalshi / Novig / Polymarket / Polymarket US / ProphetX / Rothera / Underdog Exchange via DeFi Rate: volume by category as of Oct 19, 11:30 AM ET.