The New York Rangers remain uncertain if Marc Staal's upper-body injury is really a concussion. "Marc, at this time, is being treated for neck issues which are causing him to have some symptoms," Rangers coach Alain Vigneault said. "We're not sure yet whether the symptoms are caused by the neck issues from the hit. Obviously, with his history, we're taking every precaution." Vigneault is referring to the concussion that forced Staal to miss a good chunk of the 2011-12 campaign. The defenseman has three points in 30 games this season.