There is only one sport, outside of actual combat disciplines, where two participants can square off in old fashioned, bare-knuckle pugilism without facing swift ejection. Hockey has long held a place for two willing combatants, and it has been said that "no one goes for popcorn during a fight." Fans know what to expect on the ice from players with nicknames like Knuckles, The Grim Reaper, The Bruise Brothers, or The Hammer. Yet off the ice,...