Coach Kyle Shanahan said Monday that Givens (knee) will likely miss some time, Eric Branch of the San Francisco Chronicle reports.
Givens, who was knocked out of Sunday's blowout win over the 49ers, is still undergoing testing, but the 49ers are hoping he suffered just an MCL injury and can return this season. If he's sidelined, Arik Armstead and T.Y. McGill would be the only available defensive tackles, so look for San Francisco to make a move soon to add depth to the interior of its defense.