In a hard-fought defensive battle, the San Francisco 49ers narrowly defeated the Arizona Cardinals 6-3 in Week 3 of the 2026 season. Both teams entered the matchup looking to establish momentum, but it was the 49ers who emerged victorious in a contest defined by its defensive prowess. Carson Beck led the Cardinals with a solid performance, passing for 193 yards, while Michael Wilson was the standout receiver, racking up 99 yards. However, it was Christian McCaffrey who made the difference for San Francisco on the ground, contributing 75 rushing yards that helped the 49ers control the tempo of the game. Defensively, Nick Bosa was a force for the 49ers, recording an impressive five sacks that stifled the Cardinals' offensive rhythm. The game turned when Bosa's relentless pressure led to a crucial turnover, allowing San Francisco to maintain their slim lead. With both defenses shining, the 49ers' ability to capitalize on key moments ultimately secured their victory.