That could be too.....sounds like Benn isn't out of the woods yet:

The Dallas Stars will take another look at star forward Jamie Benn on Sunday after a questionable hit from Martin Hanzal on Sunday.
The Dallas Morning News' Mike Heika believes that the team is concerned that he has a concussion, even though they're not saying it in those exact words. Losing Benn would obviously be a huge problem for Dallas, including Jaromir Jagr.

Source: Mike Heika Mar 10 - 1:38 PM

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C (4): Crosby, Roy, Stepan, O'Reilly
LW (4): Benn, Pacioretty, Umberger, Burrows
RW (4): Perry, Iginla, Atkinson, S. Gagner
F (1): Little
D (4): Boyle, Schultz, Keith, OEL
G (1): Schneider

Bench: (RW) Kassian (LW) Hagelin (D) Karlsson, Wiercioch (G) Hiller