In a tightly contested matchup, the Denver Broncos topped the San Francisco 49ers 21-13 in Week 4 of the 2026 season. With playoff aspirations on the line, this victory positions the Broncos as a formidable contender in the league, while the 49ers will need to regroup after a hard-fought battle. Bo Nix led the Broncos' offense with a solid performance, throwing for 185 yards and a touchdown. Meanwhile, Christian McCaffrey showcased his talent for the 49ers, rushing for 88 yards, and George Kittle emerged as a receiving threat, racking up 105 yards through the air. Despite the efforts from San Francisco's stars, it was Nix's efficient play that ultimately guided Denver to victory. Defensively, the Broncos made their mark with a standout performance from Zach Allen, who recorded three sacks, disrupting the 49ers' offensive rhythm. Champ Bailey further solidified the win with two crucial interceptions, one of which shifted the momentum late in the game. This turning point allowed the Broncos to maintain control and secure a vital win, showcasing their defensive prowess when it mattered most.