Miro Heiskanen is considered month to month for the Dallas Stars after having knee surgery Tuesday. The defenseman left a 4-3 overtime win against the Vegas Golden Knights on Jan. 28 at 7:56 of the third period after Vegas forward Mark Stone collided with his left leg.

Dallas Stars defenseman Miro Heiskanen had knee surgery on Tuesday and his status is "month-to-month," coach Pete DeBoer told reporters. Heiskanen, who was placed on injured reserve last week, potentially could return this season.

Heiskanen is now the third critical player the Stars have lost for an extended period of time. Tyler Seguin is out for four-to-six months following hip surgery he had done in December, and Mason Marchment has missed a month for face surgery after taking a puck to the face in late December.

Dallas Stars defenseman Miro Heiskanen is week to week with a lower-body injury sustained on a big hit from Vegas captain Mark Stone.

Dallas Stars head coach Peter DeBoer told reporters Tuesday that top defenceman Miro Heiskanen will be out month-to-month after undergoing successful knee surgery.

Placed on IR last week, Heiskanen is looked at as “month-to-month” following the procedure in New York on his injured knee, leaving a window open for