The Rams tacked on three points after their drive was extended late in the quarter when 49ers defensive end Ray McDonald was flagged for a helmet-to-helmet hit on St. Louis quarterback Sam Bradford. San Francisco held the Rams from scoring on three straight plays inside the 49ers' 10-yard line, forcing St. Louis to settle for a 27-yard field goal from Greg Zuerlein.
The 49ers struggled on offense with backup quarterback Colin Kaepernick under center. The second-year pro out of Nevada has completed just 2 of 7 passes for 14 yards in relief of Alex Smith, who left the game with a concussion in the second quarter.
Bradford is 12 for 20 with 149 yards and a touchdown, while running back Steven Jackson has carried the ball 20 times for 71 yards and a score.