|Sep. 12, 20211:31 PM PT2:31 PM MT3:31 PM CT4:31 PM ET20:31 GMT4:31 1:31 PM MST2:31 PM CST3:31 PM EST2:31 PM CT0:31 UAE (+1)16:31 ET19:31 - Mostert will undergo season-ending surgery on his knee after getting injured in the season opener.
Analysis: Coach Kyle Shanahan had said Mostert was expected to miss eight weeks because of chipped cartilage in his knee, but Mostert announced on his Twitter account Tuesday that he will miss the rest of the season. Rookie Eli Mitchell had 104 yards and a touchdown on 19 carries in place of Mostert, and will likely carry the load in the backfield for the Niners. The 49ers also have Jamycal Hasty and third-rounder Trey Sermon, who was a healthy scratch for the opener.