Serge Lajeunesse is a Canadian retired professional ice hockey defenceman who played 103 games in the National Hockey League (NHL) for the Detroit Red Wings and Philadelphia Flyers between 1970 and 1974.

The 1969 Memorial Cup was the 51st annual Memorial Cup competition, organized by the Canadian Amateur Hockey Association (CAHA) to determine the champion of junior A ice hockey. The George Richardson Memorial Trophy champions Montreal Jr. Canadiens of the Ontario Hockey Association in Eastern Canada competed against the Abbott Cup champions Regina Pats of the Saskatchewan Junior Hockey League in Western Canada. The best-of-seven series was held at the Montreal Forum in Montreal, Quebec and at the Regina Exhibition Stadium in Regina, Saskatchewan. Montreal won their 2nd Memorial Cup, defeating Regina 4 games to 0.