Hockey players are some of the toughest people out there. No matter what level, most play through some kind of injury during the course of a season. When you make the National Hockey League, the pinnacle of the sport, that need to continue playing through injuries doesn't stop, especially when you make the playoffs and are in the Stanley Cup final. We've seen some pretty gruesome injuries, but this might be one of the most impressive displays of toughness.
Hockey players, especially those that play in the NHL just don't know when to stop playing. In this case, no pain, maybe no Stanley Cup win.