Mitchell had surgery on his knee in the offseason and reinjured it during the lockout. He had been trying to rehabilitate his leg during the season, but ESPN's report states that Mitchell had arthroscopic surgery on the injured knee and will miss the remainder of the season.
The veteran blueliner had career-bests of five goals and 24 points in 76 games last season, and was a plus-7 in helping the Kings win the first Stanley Cup in franchise history.
Once again, it shows character in this dressing room. Once again, there's no quitting in here. We all wanted this so bad and we worked so hard to get home-ice advantage and we weren't going to let this one slide.
— Colorado Avalanche captain Gabriel Landeskog on his team's OT Game 1 win vs. Minnesota Wild