In the 1965–66 season, Keszler won gold at the Richmond Trophy and the national silver medal. In January 1966, Keszler placed eighth at the European Championships and then 11th at the 1966 World Championships in late February. In April 1966, it was reported that Keszler and a fellow single skater, Ralph Borghard, had considered teaming up to compete in pairs. The two practiced some lifts together but her parents rejected the idea.