Raiders Rookie QB Faces A New Test Behind Kirk Cousins

With rookie Fernando Mendoza showing promise despite early mistakes, the Raiders eye a strategic future under new leadership while managing the potential transition at quarterback.

The Raiders are through their preseason slate, and that leaves them in the waiting period before the 2026 NFL regular season opens in about two weeks. For Las Vegas, there’s plenty to keep an eye on as the real thing approaches.

Klint Kubiak is set to make his debut as head coach after winning a Super Bowl, and the offense also has a new quarterback in place to raise the ceiling from last season. At the same time, the franchise quarterback of the future is still in development, with Kirk Cousins handling the starting job to begin the year.

That setup is part of why Fernando Mendoza’s preseason work drew attention even after an interception against the San Francisco 49ers. Tyler Sullivan of CBS Sports handed Mendoza an A grade for the final week of preseason play, pointing out that there’s no need to rush him onto the field.

"Similar to his pick-six against Houston, Mendoza's interception came on a play-action play where he was under center. The ball was too high for his intended target, was tipped, and hauled in by the Niners. Given that Mendoza had little experience working under center in college, it's not surprising to see those growing pains," Sullivan said.

The mistake fits into a bigger pattern the Raiders likely expected. Play-action should be one of Mendoza’s best tools once he settles in, but the adjustment to operating under center is still part of the learning curve. He had very limited experience doing that in college, so preseason is the right place for those reps, especially when the consequences are far lower than they would be in the regular season.

There’s also a clear path for the rookie to keep growing without being thrown into the fire. If Cousins gives Las Vegas steady play in his reunion with Kubiak, the Raiders can keep Mendoza developing on the side. If Cousins doesn’t hold up, the pressure to turn to the rookie will only grow.

The praise for Mendoza hasn’t just been about the stat line or the mistakes. Raiders cornerback Eric Stokes offered his own view of the young quarterback, saying, "#Raiders CB Eric Stokes on Fernando Mendoza:"The back shoulder throws are a killer ...

He's just growing, day by day, to where you can see it in his play, talk, and confidence. He's not making the same mistake twice." pic.twitter.com/CY0PtxK2HO

That kind of feedback lines up with the bigger picture from the preseason: Mendoza’s errors are part of the process, not a reason to panic. With games now over, his job shifts to improving each week and staying locked in from the sideline.

Even without live snaps, there’s value in watching the offense unfold up close. That time on the sideline should matter when Mendoza eventually gets his turn as the starter.

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