This is a list of OHA standings and season-by-season summaries of the Ontario Hockey Association's Junior A division from 1933 to 1972, and its Tier I division from 1972 to 1974.(Main articles: List of OHL seasons and Ontario Hockey League history) Legend * GP = games played * W = wins * L = losses * T = ties * Pts = points * GF = goals for * GA = goals against