The Islanders placed Weight on the injured reserve list retroactive to Wednesday, when he suffered a sprained medial collateral ligament after colliding with New Jersey's Brian Gionta in the second period of the Devils' 4-2 win.
Weight, in his 17th NHL season, has nine goals and 26 assists in 44 games this season with New York and is the club's second-leading scorer.
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