NFL Odds Week 18: Seahawks vs Cardinals Lines, Spreads, Betting Trends

Patrick Everson Sports Betting Expert

2 minute read

Week 18 of the NFL season continues with a rather meaningless NFC West battle between the Seattle Seahawks and Arizona Cardinals. The betting odds see Arizona as a three-point home underdog despite posting a tough upset win over Philly last week. Coverage begins from State Farm Stadium in Glendale, Arizona on Sunday, January 7 at 4:25 p.m. ET on FOX.

Here's everything you need to know about the NFL odds for Week 18: Seahawks vs. Cardinals lines, spreads, betting trends and more.

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Seattle Seahawks vs Arizona Cardinals Odds

• Opening point spread: Seahawks -3.5
• Opening moneyline: Seahawks -155/Cardinals +135
• Opening total: Over/Under 47.5 points scored
• Time: 4:25 p.m. ET Sunday (FOX)

UPDATE 4 P.M. ET SUNDAY: Seattle hit DraftKings' NFL Week 18 odds board at -3 (-115) and briefly hit -3.5. The Seahawks then spent the week toggling between -3 and -2.5 at various juice. Pete Carroll's squad is now -2.5 (-120).

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Spread tickets are running 2/1 and spread money almost 4/1 on the Seahawks. Moneyline tickets and dollars are 2/1-plus on Seattle.

The total opened at 47 and spent most of the week at 48. It's two-way play, with 54% of tickets on the Over/55% of money on the Under.

UPDATE 2:30 P.M. ET FRIDAY: BetMGM pegged the Seahawks 3.5-point favorites Sunday night and spent Monday/Tuesday at various iterations of -3. Wednesday brought a move to Seattle -2.5 (-120), but Seattle is back up to -3 (-105) this afternoon.

Underdog Arizona is nabbing 56% of early spread tickets/68% of early spread money.

The total is painted to 47.5 at BetMGM, with no movement this week. The Over is taking 79% of tickets, but 68% of cash is on the Under.

UPDATE 10 P.M. ET SUNDAY: Seattle (8-8 SU/7-7-2 ATS) made Pittsburgh's offense look proficient, and in doing so put its playoff hopes in peril. The Seahawks closed as 4.5-point home favorites and lost outright 30-23.

Pete Carroll's troops are clinging to the seventh and final NFC postseason slot.

Meanwhile, Arizona sprung one of the bigger upsets of the season at Philadelphia. The Cards were catching 12.5 points and found themselves in a 21-6 halftime hole. But Kyler Murray and Co. made a huge second-half comeback and won 35-31 on a last-minute touchdown.

Seattle is a stable 3.5-point favorite vs. Arizona tonight at The SuperBook.

Click here for Vegas Insider senior reporter Patrick Everson's full NFL Odds Week 18 Report containing spreads, lines, and trends for every NFL matchup.

Seahawks vs Cardinals Pick, Prediction

Action Network NFL betting expert Brandon Anderson offers this prediction:

Check back soon for picks!

Pick: TBD

For more NFL picks, check out Action Network's NFL Week 18: How to Bet Every Game & Every Team.

The One Stat to Know About Seahawks vs Cardinals

Action Network NFL researcher Evan Abrams offers his top betting stat:

Check back soon for betting stats!

For more NFL betting stats, check out Action Network's NFL Week 18 Betting Trends, Stats, Notes.

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Patrick Everson

Patrick Everson is a senior reporter for VegasInsider. Based in Las Vegas since 1994, he's worked in the sports betting journalism/content space for more than a decade. He's most known for his deep roster of contacts behind sportsbook counters, providing readers and viewers with the ins-and-outs of how events are being bet. He's also a thought leader in the sports betting space, often appearing on or moderating panels at national conferences. More from Patrick Everson