Fernando Mendoza and Kirk Cousins just became best friends. The two Raiders newcomers, who are vying for the role of QB1 in Las Vegas this season, each participated in a “Step Brothers” parody for the team’s schedule release video on Thursday — making a clear effort to quiet those who have predicted a failed relationship between the competitors. Mimicking the way John C. Reilly and Will Ferrell went from enemies to BFFs in the 2008 classic, Mendoza and Cousins first lined up on the Raiders’ practice field and had a staredown. “You’re going to have to call me Kirko Chains,” said Cousins, who signed a five-year, $172 million contract with the Raiders last month. Kirk Cousins signed with the Raiders last month. Candice Ward-Imagn Images Fernandon Mendoza was taken with the No. 1 overall pick in the 2026 NFL Draft. Getty Images Fernando Mendoza and Kirk Cousins parodied “Step Brothers” in the Raiders’ schedule release video. X/Las Vegas Raiders “Cool,” Mendoza, the 2026 NFL Draft’s No. 1 overall pick, replied.…