The star defenseman will likely be out for months, if not the rest of the season. Expect the Stars to struggle in his absence, and to have a much better understanding of their roster when he returns.

Dallas Stars defenseman Miro Heiskanen is week to week with a lower-body injury sustained on a big hit from Vegas captain Mark Stone, and the standout from Finland won't play in next month's 4 Nations Face-Off tournament.

With Dallas Stars coach Pete DeBoer announcing at practice on Thursday that Finnish defenseman Miro Heiskanen has been ruled week-to-week with a knee injury, the team was gearing up to play an extended period of time without one of their key players.