The NFL season is officially back, but unfortunately, that means injuries are as well. It's been just one week, but all 32 NFL teams are dealing with different ailments -- some more serious than others.

San Francisco 49ers running back Christian McCaffrey is going to be out for at least the next four games. Per ESPN's Adam Schefter, the 49ers will place

Here’s today’s comment from the league: “We looked into the 49ers’ reporting of the playing status of Christian McCaffrey for the team’s Monday night game against the New York Jets. We have found no evidence of a violation of the league’s Injury Report Policy in this matter.”