In a commanding performance, the San Francisco 49ers defeated the Seattle Seahawks 51-17 in Week 12 of the 2026 season, solidifying their playoff aspirations. The 49ers showcased their dominance with an impressive offensive display, putting the league on notice as they continue their march toward postseason glory. Quarterback Brock Purdy was the star of the night, throwing for an astounding 417 yards and five touchdowns, leading the 49ers' high-octane offense. He connected frequently with wide receiver Mike Evans, who racked up 156 receiving yards, while Christian McCaffrey bolstered the ground game with 112 rushing yards. The 49ers' balanced attack kept the Seahawks' defense guessing throughout the contest. Defensively, San Francisco was just as effective, with Nick Bosa contributing 1.5 sacks and Marques Sigle grabbing an interception. The game's turning point came midway through the second quarter when Purdy's touchdown pass to Evans extended the lead to 28-10, putting the Seahawks in a deep hole they couldn't escape. The 49ers' ability to stifle Seattle's offense while maintaining their own explosive output was key to this decisive victory.