 Toronto remained hot in the semi-finals, as the Marlboros swept the Ottawa 67's eight points to zero.In the OHA finals, the Marlboros defeated the defending champions, the Peterborough Petes, eight points to six to win the J. Ross Robertson Cup and earn a berth at the 1973 Memorial Cup.The Marlboros were led by Wayne Dillon, who led the team with 47 goals and 107 points in 59 games.