FILE - In this Dec. 23, 2010, file photo, Atlanta Thrashers' Eric Boulton, left, and Boston Bruins' Shawn Thornton fight in the first period of an NHL hockey game in Boston. The first-of-its-kind ... more 
FILE - In this Dec. 23, 2010, file photo, Atlanta Thrashers' Eric Boulton, left, and Boston Bruins' Shawn Thornton fight in the first period of an NHL hockey game in Boston. The first-of-its-kind statistical analysis of the sport confirms the dirty little secret coaches and players have known since the dawn of the NHL. There is no more readily available, sure-fire way to shift the momentum of a game than to send one of your players out to start a fight. (AP Photo/Michael Dwye, Filer) less 
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Associated Press | Photo By Michael Dwye, Filer
Thu, Jan 5, 2012 7:07 PM EST