The San Francisco 49ers remained undefeated at 4-0 after a 24-14 win over the Denver Broncos, riding two touchdown passes from Brock Purdy and a late surge sparked by a fumbled punt return. Purdy distributed the ball efficiently, while Christian McCaffrey added a rushing score and Deebo Samuel delivered a short TD to put the Niners ahead in the third quarter, then George Kittle sealed it with a 56-yard TD late. Denver cut the margin to 17-14 but failed to sustain a rally despite a late touchdown drive from Bo Nix and Waddle, as San Francisco capitalized on injuries to Denver’s cornerbacks. The victory solidifies momentum for San Francisco heading into a road matchup with Seattle, while Denver eyes a bounce-back against Los Angeles.