The move became official Tuesday when the Raiders traded veteran quarterback Kirk Cousins to the Minnesota Vikings, clearing the way for the rookie who has been waiting in the wings since being selected with the top draft pick.

Mendoza, who won the Heisman Trophy last season while leading Indiana to a national championship, has appeared in just one game. He completed 6 of 8 passes for 48 yards in late action during a blowout loss to New England.

Now he faces a Seattle defense that allows a league-low 244.2 yards per game and has a knack for making even the NFL's best quarterbacks uncomfortable.

"Every week in the NFL is tough, and this is the best defense in the NFL," Raiders coach Klint Kubiak said. "He's got to go do his job and not worry about a whole lot else."

Kubiak knows the Seahawks' scheme intimately. He spent last season as Seattle's offensive coordinator, helping guide an offense led by quarterback Sam Darnold and running back Kenneth Walker III that paired with coach Mike Macdonald's aggressive "Dark Side" defense to win the organization's second Super Bowl championship.

That Seattle team was built to win now. These Raiders are still finding their footing, though they have shown progress. Las Vegas has already surpassed its three-win total from last season and averages 26.4 points per game, eighth in the NFL, after reaching that mark just once in 2025.

"They're building it around the people that they have and they're doing it at a high level," Macdonald said of the Raiders. "I respect how they operate, obviously, and they have great people and good players. They're moving the ball and putting up a lot of points."

Seattle's staff has limited film to study on Mendoza, adding an element of uncertainty to Sunday's matchup. The rookie has acknowledged a steep learning curve, and the Raiders brought him along slowly while Cousins ran the offense. But word from the locker room is that Mendoza made the most of his preparation time and strung together impressive practices in recent weeks.

"Sometimes coach Sully (quarterbacks coach Mike Sullivan) will reference back to 'Spring Fernando,'" Mendoza said. "I don't want to talk about myself in the third person, but it just shows how much improvement there's been. I'm a lot more confident as a quarterback, and I feel more developed."

The trade of Cousins, who had a 4-5 record as the Raiders' starter this season, signals a clear pivot toward the future in Las Vegas. For a fan base that has endured lean years, Mendoza's debut represents both a gamble and a promise — a highly decorated rookie getting his shot against the NFL's toughest test.

Kickoff is set for Sunday in Las Vegas.