Tatar was shaken up during the third period of Wednesday's preseason game after being kneed in the head by a linesmanl following a cross-check from Pittsburgh's Blake Comeau, the Bay City Times reports. Obviously Tatar will be checked out in case he suffered a concussion, though we'll await further word from the team and hopefully it's something much milder. The Wings already have other injuries amid the forward ranks, so Tatar's health becomes a depth issue as well.