Jacobs sustained the injury to his left knee after Houston Texans CB Kareem Jackson slammed into his leg following an eight yard run in Saturday's exhibition game. The former New York Giant had to be helped off the field and wasn't able to put any weight on his leg as he was assisted to the locker room, leading to speculation that the injury could be severe.
Following his 4 p.m. MRI, Jacobs tweeted "Good, Good, Good," giving fans a ray of hope that Jacobs season wasn't finished as many had feared.
Rapoport is reporting there is still no timetable for Jacobs return though. Luckily for the 49ers, running back LaMichael James, who also suffered an ankle injury of his own in the game, is not expected to miss any practice time.
For more injury updates and all your 49ers news, head on over to Niners Nation.
RB Brandon Jacobs was helped off the field after injuring his knee in San Fransisco's loss 20-to-9 loss to the Houston Texans. At the end of Jacobs' only rush of the game, Texans CB Kareem Jackson made direct contact with Jacobs' leg, causing the player to remain on the ground for a few minutes. Once returning to the sidelines, Jacobs was unable to put any weight on his leg as he made his way to the lockeroom.
This is a tough break for running back who was looking to revive his career in San Francisco after five seasons with the New York Giants. The loss, whether it be short or long-term, will not have a devistating impact on the 49ers. In addition to Jacobs, SF has Frank Gore and Kendall Hunter to pick up the carries.
Newly acquired San Francisco 49ers running back Brandon Jacobs went down with what appears to be a serious left knee injury in the first quarter of Saturday night's preseason game against the Houston Texans.
The injury occurred on Jacobs' first carry of the game, an eight yard run. His left knee appeared to collide with cornerback Kareem Jackson's helmet/shoulder pad area and Jacobs remained down on the field for several minutes.
The extent of the injury is unknown, although Jacobs will not return tonight and was unable to put any weight on his left leg while being escorted from the game.
Without Jacobs, the 49ers will turn to Frank Gore, Kendall Hunter and Anthony Dixon to pick up additional carries.
The 49ers and Texans were tied 3-3 after the first quarter of play.