HENDERSON, Nev. β€” The Las Vegas Raiders brought a sharper edge to their practice on Sunday, determined to erase the sting of their preseason opener. The team gathered at their headquarters in Henderson with a clear mission: fix the breakdowns that led to a 27-14 loss to the Arizona Cardinals last Thursday.

The secondary, in particular, faced scrutiny. Cornerback Darien Porter did not shy away from the reality of the performance. "We never want to put that on our resume, but it happens, so now we just have to learn from it," Porter said. The defensive backfield allowed 16 straight completions, a glaring issue that head coach Klint Kubiak sees as part of a broader team problem.

"As a team, we have to improve," Kubiak said. "There's a lot of improvement β€” offense, defense, special teams. It is our fourth week of training camp. We're a team that's still gelling together." Kubiak has long preached the importance of "shocking effort," and he expects every player to bring that intensity every day.

One player who has embodied that mentality is rookie quarterback Fernando Mendoza. The undrafted free agent out of Cal has drawn attention for his work ethic and leadership. Fullback Connor Heyward offered a glimpse into Mendoza's routine. "Seeing him here early morning, late night, walking through the indoor by himself with one of the other rookie quarterbacks, going through the script, just bringing other guys along," Heyward said. "When you have a quarterback like that, the future is very bright."

Mendoza is expected to get more reps against the Texans, a chance to build on his first NFL action. The coaching staff wants to see how he handles game situations after spending time in the film room dissecting his performance against the Cardinals.

The Raiders' upcoming matchup is set for Thursday, Aug. 20, at 5 p.m. in Houston. The team will travel to face the Texans, looking to correct the mistakes that plagued them in the opener. Kubiak emphasized that every unit must step up. "We never want to put that on our resume, but it happens, so now we just have to learn from it," Porter repeated, underscoring the team's mindset.

Beyond the game, the Raiders' roster also features stories of community impact. Safety Jeremy Chinn, whose aunt experienced homelessness, has carried that cause throughout his NFL career. He now focuses on providing resources, confidence, and care to people in need in the Las Vegas area. But on the field, the immediate priority is building momentum.

As the team continues to gel, the coaches are monitoring progress across the board. The offensive line, receiving corps, and special teams units all have areas to refine. The preseason schedule offers a chance to experiment with personnel and schemes, but the urgency is real. The regular season looms, and every rep matters.

Players like Porter and Heyward, along with veterans and rookies alike, understand that the preseason is about growth. The loss to the Cardinals was a wake-up call. Now, the Raiders are pushing to show they can respond with a more disciplined, aggressive performance against the Texans. The energy at Sunday's practice suggested a team that refuses to dwell on failure, instead channeling frustration into preparation.