In a tightly contested matchup, the San Francisco 49ers hold off the Denver Broncos with a final score of 27-19, improving their record in Week 4 of the 2026 season. The stakes were high as both teams aimed for a crucial victory to solidify their playoff aspirations. Bo Nix showcased his talent for Denver, throwing for 272 yards and two touchdowns, but it was Christian McCaffrey who led the charge for San Francisco with a commanding 118 rushing yards. The 49ers' offense found balance throughout the game, with key contributions from their receiving corps, keeping the Broncos' defense on its heels. Defensively, the 49ers made key plays that shifted the momentum in their favor, highlighted by Nick Bosa's 1.5 sacks and Dre Greenlaw's pivotal interception. The turning point came late in the third quarter when Greenlaw picked off a crucial pass from Nix, setting up a touchdown that extended San Francisco's lead. Overall, the 49ers' defensive performance was instrumental in securing their victory against the Broncos.