Week 6 grades: Offense

SAN FRANCISCO – The 49ers just lost 26-3 to the New York Giants. Here are the grades for the 49ers’ offense.

Quarterbacks: F. This was Alex Smith’s worst game under Jim Harbaugh. Smith threw three picks – the most he’s thrown since 2007. In the first half he missed a handful of open receivers. Then he tried to force a few passes and got picked off. At the end of the third quarter the 49ers were losing by 20 points. Smith completed a 6-yard pass on a crucial third and 21 and then followed that up with a 7-yard completion on fourth and 15 from his own 34 yard line. The 49ers had no chance to win after that play.

Colin Kaepernick played roughly 20 snaps. Coming into the game he was averaging 10 yards per run, but he only gained 6 yards on 2 carries against the Giants, and he was sacked twice for a combined loss of 17 yards. He threw one nice pass – a laser to Mario Manningham at the end of the first half.

Offensive line: D. They gave up 6 sacks – Smith took 4 and Kaepernick took 2. They also gave up 9 QB hits. Anthony DavisA gave up his first sack of the season, as did Alex Boone. Joe Staley left the game with a concussion and probably will not play Thursday against the Seahawks. Mike Iupati and Jonathan Goodwin were both flagged for holding penalties. On the positive side, this unit continued to block well in the running game.

Running backs: A-. Frank Gore averaged 4.5 yards per carry. Kendall Hunter averaged 6.5 yards per carry. The problem was they only rushed 12 times combined. Gore didn’t get a single carry in the second half.

Wide receivers: D. The offensive game plan seemed to revolve around getting the ball to Mario Manningham. He led the 49ers with 10 targets, but he only caught five passes. Kyle Williams caught four passes – two were third-down conversions. Michael Crabtree continued his slump against the Giants, catching just three passes for 26 yards. Randy Moss caught two passes, one for a 55-yard gain.

Tight ends: D. The Giants took Vernon Davis out of the game. They bumped him at the line of scrimmage and double covered him as he ran his routes. As a result he caught just three passes for 39 yards. Delanie Walker was targeted twice but he did not catch a pass. He could not break up an interception on a deep throw from Alex Smith.

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