TORONTO, Feb 16 (Reuters) - The Toronto Maple Leafs showed no mercy to their injury-ravaged rivals on Saturday in claiming a 3-0 victory over the Ottawa Senators in the 'Battle of Ontario'. While every team in the lockout-shortened season have had to deal with injuries, few, if any, have been hit as hard as Ottawa. The Senators have five players on what amounts to an All-Star disabled list, including Erik Karlsson, the reigning Norris Trophy winner as the National Hockey League's top defenseman. ...