Habs’ Gallagher concussed after being hit from behind by Flyers’ Luke Schenn (VIDEO)

The Montreal Canadiens have announced that winger Brendan Gallagher, the fifth-leading scorer among rookies, is out with a concussion after suffering a hit at the hands of Philadelphia Flyers' defenceman Luke Schenn:

The hit occurred just under four minutes into the third period of the Flyers' 4-1 loss to the Canadiens Saturday. With Gallagher up against the boards, Schenn hit the forward from behind, appearing to drive his elbow into the back of his head:

Gallagher, who had a goal and an assist earlier in the game and was named the first star, would take two more shifts before leaving the game.

There was no penalty on the play.

But will the discipline come later? It's a textbook hit from behind, and while it wasn't overly visible to officials in real-time, the replay does appear to catch Schenn driving through the back of Gallagher's head with forearm/elbow area.

If you watch carefully, you'll see that Gallagher avoids having his head hit the glass on the first contact, but as Schenn follows through with the elbow, Gallagher goes face-first into the glass. That seems like the sort of thing Brendan Shanahan might find objectionable. Might Schenn sit for this, or will the DOPS see as little wrong with it as the on-ice officiating crew?

If Schenn does get a short ban, it's worth noting that he and Brayden will become the first set of brothers to be suspended within a month of one another during the Shanahan era. History!

Follow Harrison Mooney on Twitter at @HarrisonMooney