The San Francisco 49ers can breathe a sigh of relief after 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.
Jacobs left the 49ers' preseason loss to the Houston Texans on Friday after taking a direct hit from cornerback Kareem Jackson on an 8-yard run near the end of the first quarter.
The running back was unable to put weight on his left leg and was carted to the 49ers' locker room.
Follow Ian Rapoport on Twitter @RapSheet