The San Francisco 49ers squeaked out a win on Sunday against the Detroit Lions and Trey Lance threw his first career pass– which was also a touchdown pass. But, despite the win, the 49ers were hit with some big injury news. Running back Raheem Mostert left the game early, and on Monday it was revealed that he will be out for eight weeks and is headed to IR. 

That definitely throws a massive wrench in the 49ers' plans as far as the offense is concerned. Prior to Sunday's game, they also had rookie Trey Sermon inactive in a shocking move. But Elijah Mitchell came in, another rookie, and ran wild after Mostert left the game.

Mitchell finished with 19 totes for 104 yards and a score and definitely looked as if he could be the lead man.

Now, is Mitchell really the 49ers' answer at running back? Who knows, especially after the surprising move to have Sermon not dressed for the first game.

Mitchell did look good, albeit, against the Lions' defense, so maybe everybody should relax on the hype. On the other hand, there must be a reason why Sermon was inactive, and after Mitchell, the only other option is JaMycal Hasty.

In a realistic world, Trey Sermon is the guy, with Mitchell as the next guy and a scary two-man group at running back. Here's the truth: Kyle Shanahan is going to run the ball with whoever is there, and both Mitchell and Sermon should play a major role for the remainder of the season–or at least until Mostert returns from injury.