After looking at the video replay of Mike Iupati, former NFL team physician Dr. David Chao believes the 49ers offensive lineman has a serious MCL sprain.
Based on video review, the suspicion is that Iupati suffered a significant MCL sprain. He exited the game on a cart and left the locker room on crutches with a knee brace. The extent of his injury is not yet known.
This is certainly not going to help the reeling 6-4 Niners.