Sheldon Keefe said after practice today that Kase is feeling well, and that he was trying to get back into the game on Saturday. Now, we've seen players in Kase's situation try to re-enter games.
John Tavares tried to pick himself up off the ice during Game 1 of the Leafs/Habs series, but he certainly was not in any condition to continue playing, even after he had some time to regain his faculties. Obviously, the two situations are much different, but the fact remains that a player is never the best judge of what is the safest bet - especially if they're competitive by nature.