Rangers captain Ryan Callahan out 4-6 weeks with knee sprainCopyright 2014 Associated Press. All rights reserved. This material may not be published, broadcast, rewritten, or redistributed.SI Staff|Share on FacebookShare on XAdd us as a preferred sourceRangers captain Ryan Callahan out 4-6 weeks with knee sprainCopyright 2014 Associated Press. All rights reserved. This material may not be published, broadcast, rewritten, or redistributed.Published Dec 11, 2013 | Modified Dec 11, 2013SI STAFFShare on FacebookShare on XHome/NHL