Offense: Running back DuJuan Harris delivered some pop in his first start of the season, especially as a pass catcher, and the 49ers’ “catch and knife” attack got rolling in the first half. The demerits included a first-quarter interception by Colin Kaepernick and an inability to carry second-quarter momentum into the second half. Grade: C+
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Defense: The 49ers have given up 100 rushing yards to seven straight opposing tailbacks. New Orleans’ Mark Ingram cruised past the 100-yard barrier early in the third quarter on his way to 158 rushing yards. The only question by game’s end was whether San Francisco would allow two 100-yard rushers. Tim Hightower finished with 87 yards. Grade: F
Special teams: The 49ers received a needed boost from first-time kick returner JaCorey Shepherd, who averaged 34.7 yards per return on three chances. The returns were the second-year player’s first in the NFL. Meanwhile, steady Phil Dawson hit field goals from 49, 48 and 46 yards. Grade: A-
Overall: How can a team that fails – miserably – to do something as elemental as stopping the run be competitive, much less win another game this season? That’s what the 49ers must answer and solve before going on the road to face Arizona’s David Johnson, who ran for 157 yards and two touchdowns against them in Week 5. Grade: D+