In a decisive Week 3 showdown, the San Francisco 49ers topped the Arizona Cardinals 19-7, solidifying their position early in the 2026 season. The victory was crucial for the 49ers as they aimed to establish dominance in their division and keep pace with early frontrunners. Brock Purdy led the charge for San Francisco, throwing for 206 yards and a touchdown, showcasing his ability to manage the game effectively. Christian McCaffrey provided a strong ground game, racking up 93 rushing yards and keeping the Cardinals' defense on their heels. Meanwhile, Deebo Samuel Sr. was a key target for Purdy, contributing 95 receiving yards to help the 49ers maintain momentum throughout the contest. Defensively, the 49ers were relentless, with Nick Bosa leading the charge with two sacks that disrupted the Cardinals' offensive rhythm. The turning point came late in the second quarter when Bosa's pressure forced a crucial turnover, allowing San Francisco to extend their lead just before halftime. The Cardinals struggled to recover from that setback, unable to overcome the solid defensive performance that helped seal the 49ers' victory.