Seahawks vs Cardinals Picks, Predictions & Splits

• I’m backing the Cardinals to cover the +4.5 spread (-117) in what should be a tight Seahawks vs Cardinals game
• This divisional matchup could stay below the under (U 41.5) in Seahawks vs Cardinals odds
• My top Seahawks vs Cardinals prop is Jacoby Brissett’s passing yards hitting the over (O 220.5, 11-5)

The 1-0 Seattle Seahawks travel to Glendale to battle the 1-0 Arizona Cardinals in a pivotal NFC West showdown. Kickoff happens on Sunday, September 20, 2026, at 4:25 PM ET on FOX at State Farm Stadium. Both squads boast active one-game win streaks and bring early-season momentum into a matchup with crucial divisional implications.

This contest presents an intriguing spot as Seattle takes the field as a road favorite against the home underdog Cardinals. The favorite seeks to establish dominance with its defensive front, while Arizona relies on quarterback Jacoby Brissett and safety Budda Baker to set a physical tone.

Bettors face a classic decision: lay the points with the visiting squad or grab the value with a capable divisional host. In this guide, I’m analyzing the analytical tools to handicap the game, breaking down spread picks, over/under totals, player props, and public betting splits to uncover actionable edges.

Seahawks vs Cardinals Predictions and Expert Picks

Spread Pick: Cardinals +4.5 (-117 at Polymarket)

Despite opening as a home underdog, Arizona holds a pronounced statistical advantage across major offensive efficiency metrics, making them an exceptional bet to cover with the added half-point hook at +4.5. The Cardinals produce a prolific 26.0 points per game — doubling Seattle’s meager 13.0 PPG output — while generating 5.8 yards per play compared to the Seahawks’ stagnant 4.4 yards per snap. Landing the +4.5 line provides vital cushion through the key four-point margin in a closely contested divisional matchup.

This offensive disparity centers around situational execution on high-leverage downs. Arizona consistently sustains drives with a 42.9% third-down conversion rate, whereas Seattle sputters at an abysmal 18.2% conversion rate (a massive +24.7% net success differential for the Cardinals). Furthermore, Arizona converts 40.0% of its red-zone trips into touchdowns, while Seattle has failed to score a single red-zone touchdown (0.0% efficiency rate on 0-of-3 trips). Backing the significantly more explosive and situationally disciplined unit as a home underdog with +4.5 points provides clear positive expected value.

Over/Under Pick: Under 41.5 Points (-104 at Kalshi)

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Kalshi

Under 41.5 Points

51%

Predict

While Arizona has shown offensive efficiency, the underlying pace and defensive profiles strongly indicate a low-scoring divisional grind, with the 41.5 line crucially clearing the key scoring threshold of 41 (protecting against common 24–17 / 27–14 outcomes). Seattle enters this contest boasting an elite defensive unit that allowed just 10 points and 277 total yards in Week 1 against the Packers on a suffocating 4.6 yards per play. They consistently neutralized explosive plays and forced long, time-consuming drives.

The visiting Seahawks’ offensive limitations will further suppress the total scoring ceiling. Seattle scored only 13 points in Week 1 and didn’t even score a red-zone touchdown in the win, stalling repeatedly inside the 20-yard line. When paired with a Seattle defense that limits opponents to a meager 31.3% third-down conversion rate against an offense of their own converting just 18.2%, both squads project for extended punt-heavy stretches and drained clock possessions, making Under 41.5 the highest-value total on the board.

Player Prop Pick: Jacoby Brissett Over 220.5 Passing Yards (-115 at BetMGM)

Arizona’s passing attack enters this matchup on a strong note after piling 277 gross passing yards in Week 1, a massive +56.5-yard cushion over his modest 220.5-yard line at BetMGM.

While Seattle’s defense is stout and allowed just 277 total yards in Week 1 and a 31.3% third-down rate, Brissett’s path to the Over is driven by sheer drive volume. Even with Seattle suppressing Brissett to a modest 6.3 yards per attempt, a projected 36–38 dropbacks reliably carries him over the 220.5-yard threshold.

Seahawks vs Cardinals Public Betting Splits

Here is a breakdown of where the money flows for this divisional clash:

• Moneyline: Seahawks 91.15% | Cardinals 8.85%
• Spread: Seahawks 74.19% | Cardinals 25.81%
• Total: Over 66.71% | Under 33.29%

When cross-referencing these financial splits against our projections, we find strong value in fading the NFL public betting narrative. Bettors aggressively back the road favorites, funneling 74.19% of the spread handle toward Seattle. Conversely, our models identify distinct value in taking the 4 points with the home underdog.

The public also anticipates a shootout, dumping 66.71% of the cash on the Over. Our official recommendation targets the Under at 40.5, banking on the visiting team’s red zone ineptitude to limit the scoreboard. Both the handle and ticket percentages heavily align on the favorite and the Over, leaving no significant sharp versus public divides to exploit.

Seahawks vs Cardinals: Situational Betting Trends

• The total has gone under in 75% of the Seahawks’ last four road games.
• The total has gone under in 75% of Seattle’s last four games when favored by fewer than seven points.
• The total has stayed under the projected line in 100% of the Seahawks’ games played so far this season.

Seahawks vs Cardinals Odds

Odds as of September 19, 2026, at 3:08 PM UTC from BetMGM. Claim your BetMGM promo now

Oddsmakers list Seattle as 4-point road favorites, requiring a victory margin exceeding a field goal to cover the spread. The moneyline pricing heavily favors the visiting squad to win outright. Meanwhile, the game total sits at a modest 40.5 points, projecting a grinding field-position battle.

Removing the sportsbook vig reveals the true normalized probabilities for this matchup. The raw math gives Seattle a 65.0% chance of winning the game outright, while Arizona holds a 35.0% probability of pulling off the home upset.

Seahawks vs Cardinals Injury Report

Here’s a look at the updated injury report ahead of this Week 2 matchup in the 2026 NFL regular season.

The Seahawks have a few question marks on offense, mainly via Sam Darnold and Cooper Kupp. Darnold has been ruled out, meaning Drew Lock will get the keys to the Seahawks’ offense, but Kupp should be available. Not having Darnold and relying on a backup quarterback boosts the idea of this game hitting the under.

As for the Cardinals, most of their absences are on the defensive side of the ball. but neither of the listed absentees should be sizable losses for Arizona. Brissett will carry the passing attack while 2026 NFL Draft first-round pick Jeremiyah Love should handle most of the rushing workload.

Seahawks vs Cardinals Team Stats

Evaluating per-game statistical outputs from the current regular season reveals exactly how these divisional rivals stack up against one another in the trenches.

Cardinals Offense vs Seahawks Defense
The primary tactical battleground pits Arizona’s high-octane offense against Seattle’s stingy defense. The home squad generates 393.0 total yards and 26.0 points per game, anchored by a passing scheme netting 277.0 yards. However, they face a secondary yielding a mere 168.0 passing yards per contest. To cover the spread, Arizona must exploit their 42.9% third-down conversion rate against a defense allowing a 31.3% success rate in those pivotal situations.

Seahawks Offense vs Cardinals Defense
Conversely, Seattle faces a glaring mismatch when operating the football. The visitors average just 13.0 points and 285.0 total yards. This sluggish unit squares off against a disciplined defense surrendering only 268.0 yards and 14.0 points per game. Seattle’s abysmal 18.2% third-down conversion rate spells disaster against a defensive front that forces punts 75.0% of the time on third down.

Quarterback and Playmaker Props
Brissett commands the Arizona offense efficiently. Oddsmakers set his passing yards line at 220.5, a highly exploitable number given his team’s 277.0 air yards-per-game average. He targets tight end Trey McBride (61.5 receiving yards prop) and rookie wideout Marvin Harrison Jr (36.5 receiving yards prop) to move the chains.

Drew Lock steps in under center for the visiting squad, facing a passing yards total of 206.5. This presents a steep climb for an offense averaging just 188.0 passing yards. Lock relies heavily on Jaxon Smith-Njigba (79.5 receiving yards prop) and veteran Cooper Kupp (22.5 receiving yards prop) as they navigate a brutal defensive matchup.