The Arizona Cardinals turned heads in Week 1 with a 26-14 win over the Los Angeles Chargers at SoFi Stadium, and while Mike LaFleur’s offense got plenty of attention, the defense quietly shaped the result. One of the biggest reasons: Arizona leaned harder on Cover 6 than any other team in the league.
According to Football Insights, the Cardinals used Cover 6 on 42.9% of their defensive snaps, the highest rate in the NFL in Week 1. It was the most common coverage in football by a wide margin for Arizona, and it says plenty about what defensive coordinator Nick Rallis wants to do.
Cover 6 is one of those concepts that sounds simple until you actually start tracing it across the field. It blends Cover 2 on one side with Cover 4 on the other, creating a split look with two high safeties, one boundary corner dropping deep, and three deep zones overall.
The other corner stays in the flat. It’s a chess move, not a basic call, and quarterbacks have to work through it fast.
That’s part of the appeal for Rallis. His defense is built around confusion after the snap, not constant heat off the edge.
The Cardinals blitzed at a middle-of-the-pack rate last season, and in Week 1 they sent pressure on just 20% of plays, which ranked second to last on Sunday. He’s not Brian Flores, but he doesn’t need to be.
The point is to muddy the picture.
And Cover 6 does that better than most coverages. Quarterbacks are already trying to diagnose the defense before the ball is snapped, but this look can hide its intentions and then change the picture immediately once the play starts.
That makes it harder to get through reads cleanly, and the numbers back up the danger. Per Sumer Sports, Cover 6 had the highest interception rate of any coverage last season, and when prevent snaps are removed from the 2025 regular season, it still sits at the top at 2.63%.
The Cardinals got a taste of that payoff against Justin Herbert. Their pass rush finished with three sacks, even though Josh Sweat wasn’t a factor. The coverage helped slow things down just long enough for the pressure to get home.
Still, there’s a reason not every team lives in this look. Cover 6 asks a lot from the defense that runs it.
Communication has to be sharp, assignments have to be clean, and everyone has to see the same picture at the same time. That’s not always been the Cardinals’ strong suit, and one of the recurring issues around Rallis’ group has been missed assignments and busted communication that leave receivers open.
The scheme also has its soft spots. It can leave the flats vulnerable, and there’s room between the boundary corner and safety.
Offenses can attack the Cover 2 side with seams, streaks and posts, too. It can help against the run, but it’s not a cure-all.
For Arizona, though, it worked in Week 1. The Cardinals leaned into one of the league’s most complicated coverages, and the result was a defense that helped deliver the upset. The bigger question now is how long that edge lasts once offenses get more film and start sorting it out.
In Other News...
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Now the Jaguars are taking a chance on a player whose talent still made him worth a look after Arizona moved on from him before the 2024 season. Jacksonville appears to be adding him in response to an edge-rush need after Week 1, giving Ojulari a fresh path to prove he can still carve out a place in an NFL pass rush. [Read more 🡒]
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Mike LaFleur Just Put Trey McBride In Rare Company
Mike LaFleurs first win as a head coach gave him plenty to talk about, but he also made sure to single out one of the Cardinals most important offensive pieces. During an appearance on The Pat McAfee Show, LaFleur praised Trey McBrides mental and physical toughness, his ball skills and the way he leads, painting a picture of a tight end who already does plenty of heavy lifting for Arizona and still has more room to grow.
LaFleur went a step further by comparing McBrides ability to control the pace of a play to Luka Doncic, which is rare company for any pass catcher. The bigger takeaway for the Cardinals is what came next: LaFleur said McBride is still improving, a reminder that Arizona may be watching its top tight end enter the kind of stretch where the ceiling keeps creeping higher. [Read more 🡒]