It’s tough to be too hard on Colby Armstrong for initially concealing his concussion symptoms. The guy’s been dealing with a rash of injuries during the last few seasons and probably wants to stay on the ice at all costs. The situation does make you wonder how common it is for NHL players to hide such things from their teams, though. Ed Olczyk and Keith Jones cover all the bases on that subject in the video below.This video is no longer available. Click here to watch more NBC Sports videos!