Update: Sunday, August 19th at 9:02 p.m. ET by Richard Langford
...an MRI has revealed running back Brandon Jacobs suffered "no major damage" to his left knee, according to a source with knowledge of his condition.
Given Jim Harbaugh's tweet (see below), there is still certainly a possibility that Jacobs' injury is severe enough that he could miss some regular season time, but with this MRI news, it is safe to say that Jacobs will not be on the shelf for any prolonged period.
Update: Saturday, August 18th at 11:25 p.m. ET
Jim Harbaugh delivered a cryptic message regarding Jacobs' status. The 49ers' official Twitter page provided this quote from the head coach regarding his fallen RB:
Harbaugh said Jacobs will miss some time, but said it's "not the you don't come back from variety."— San Francisco 49ers (@49ers) August 19, 2012
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CBS Sports blog Eye On Football reported:
Brandon Jacobs carted back to locker room after suffering a left leg injury. Looked in serious pain:yfrog.com/nvcnjptp— Eye on Football (@EyeOnNFL) August 19, 2012
Jacobs was hurt on his first and only carry of the game, going down after Texans cornerback Kareem Jackson hit him directly on the left knee. Team doctors helped him off the field, then carted him from the sideline to the locker room.
This is an unfortunate development for the 30-year-old Jacobs, who was looking to resurrect his career after his role with the New York Giants became reduced.
We will have all the updates on Jacobs' injury when they are made available.