Ottawa Senators' Jared Cowen hits New York Rangers' Ryan Callahan during the first period of game six of first round NHL Stanley Cup playoff hockey action at the Scotiabank Place in Ottawa on Monday, April 23, 2012. The Senators have agreed to terms with defenceman Cowen on a four-year contract.THE CANADIAN PRESS/Sean Kilpatrick
The National Hockey League has announced changes to their concussion protocol regarding the use of concussion spotters. Last season, the NHL introduced concussion spotters into their protocol by stationing spotters at every single NHL game to watch the games live with access to live feeds with replay capabilities.