Denver Post reporter Adrian Dater was the first to report the news, he has stated that he believes the Avalanche forward failed some kind of drug test, but could not be any more specific than that.
Clearly, whatever test he failed, it was a big one, as it has resulted in Nichuskin being put back in the Player's assistance program. This is not his first time with the program, possibly why he has gone straight to stage three. The significance of this is that he now faces a minimum 6-month suspension from the NHL.
Nichuskin had 9 goals in 8 playoff games for the Avalanche, leading the team. His loss will be a tough one to overcome as the Stars were already the deeper team up front. Without Nichushkin, this series could get away from Colorado very quickly.