According to CSNPhilly.com, Hartnell took a shot off his left foot at 6:53 of the third period and was seen walking gingerly after the game.
If Hartnell, who tied for sixth in the League last season with 37 goals, is unavailable for Thursday's game against the New York Rangers, it could put a struggling team already in deeper trouble. Philadelphia has three goals in three games and entered the season weakened by the offseason departures of James van Riemsdyk and Jaromir Jagr, as well as the wrist injury sidelining Danny Briere.
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