BALI, Indonesia -- Stephen Harper has dropped his prime ministerial gloves and put on his hockey historians helmet to wade in on the subject of violence in Canadas most popular sport. And he did so from a beach-front hotel in Bali, Indonesia, of all places. The prime minister, who has a book coming out next month on the early history of professional hockey, prefaced his unsolicited comments Tuesday on his role as an author, not as a politician. "Since Im taking off my hat soon on this (hockey historian) business anyway, as you know, I welcome the opportunity to comment on it," he told bemused reporters at a closing news conference following a summit of Asia-Pacific leaders. Harper -- a sharp-elbowed partisan in the political game -- said hockey is a rough sport but hes an admirer of skill over brawn. "I do think that authorities have historically not taken their responsibility to try and keep the rough, tough part of the game within the rules," he said, adding hes particularly concerned about head shots. "These are very serious issues and they do have to be taken seriously by the NHL and other sports bodies." Last weeks opening of the 2013-14 NHL season saw a nasty incident in which Montreal Canadiens enforcer George Parros pitched to the ice during a battle with Toronto Maple Leafs tough guy Colton Orr, falling hard on his chin and knocking himself unconscious. The Parros incident was one of several that marred the early season and renewed yet again the debate over fighting on ice. "Im not trying to be nonchalant about some of these incidents, which I think are of concern to any parent watching this and seeing examples set and worrying about what could happen to their own boys and girls when they step on the ice," Harper said, speaking in a hotel penthouse room overlooking the Indian Ocean. "That all said, what we all have to realize is that this debate is as old as the game itself." In fact, said historian Harper, "there has never been an era in hockey, including from the very beginning, where violence was not an issue of controversy." Matters are actually less rough today, said the prime minister, who called the level of violence in pre-war hockey "quite shocking." Harpers coming book is titled "A Great Game: The Forgotten Leafs and the Rise of Professional Hockey." Author and Globe and Mail columnist Roy MacGregor acted as an editorial consultant on the book, which is to be released Nov. 5, with proceeds going to a military charity. 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"Im excited just for a new start, just to see where things are going, to bring some kind of tradition back to the team and guys being excited about something new," the defensive back said during a conference call Monday after agreeing to stay with the Bombers rather than go to free agency next month.FRANKFURT, Germany -- Title holder Bayern Munich cruised to its 20th German Cup final by beating second-division Kaiserslautern 5-1 on Wednesday. Bayern will seek its 17th title in the May 17 final in Berlin against Borussia Dortmund. Three-time winner Dortmund advanced on Tuesday by beating Wolfsburg 2-0. It will be a repeat of the 2012 final that Dortmund won 5-2. Dortmund won 3-0 in Muinich in the Bundesliga on Saturday. Bastian Schweinsteiger opened the scoring in the 24th, Toni Kroos doubled the lead in the 32nd and Thomas Mueller converted a penalty in the 50th for a 3-0 lead before Simon Zoller pulled one back for the visitors on the hour mark. Mario Mandzukic scored in the 78th and substitute Mario Goetze completed the victory in injury time. Kaiserslautern, fourth in the second division, played well and sought its chance in attack. "We played against in my opinion the best team in the world and we held our ground most of the time," Kaiserslauterrns coach Kosta Runjaic said.dddddddddddd. Bayern has been struggling in domestic competition, losing two and drawing one of the three matches since it clinched the Bundesliga title. "We downshifted a little bit in the Bundesliga, but its important to win big games," Kroos said. Bayern has reached the semifinals of the Champions League and visits Real Madrid next week. Bayern is on course to retain all three titles it captured last season in an unprecedented sweep for the club. Schweinsteiger headed in a free kick cross from Arjen Robben, who also set up Kroos for the second goal. And Robben earned the penalty, after being felled by Kaiserslautern defender Chris Loewe. Madzukic was set up by Goetze, and slotted inside the far post. Goetze then waltzed through Kaiserslauterns defence to score after Franck Riberys backheel pass. Bayerns regular goalkeeper Manuel Neuer sat out the match with a calf injury and was replaced by Lukas Raeder. ' ' '