Mitchell has not played since Game 6 of the opening round against the San Jose Sharks because of a lower-body injury. He will replace Matt Greene in the lineup.
The Kings played nearly the entire second round against the Anaheim Ducks without Mitchell and fellow veteran Robyn Regehr, who was injured in Game 1 of that series. Jeff Schultz was recalled from the American Hockey League to replace Regehr and has played well in his first NHL action of the season.
Mitchell missed all of last season with an injury, but was instrumental in the Kings' march to the Stanley Cup in 2012.
For our team, as a group, we've never been this far before, and so it's just more lessons learned, and sometimes you have to go to the school of hard knocks to find out what works and what doesn't. We've got a young group. They've played some unreal hockey here to get us this far, and we showed if we're not going to play the proper way, a really, really good hockey team is going to beat you, and that's what they did. It's a lesson learned.
— Lightning coach Jon Cooper after Rangers win in Game 6 forced a Game 7 that will be played at Madison Square Garden on Friday