 Because the team finished poorly, Cassidy's former team again secured a draft lottery pick following his departure, selecting Jonathan Toews with the third overall pick.Cassidy was hired by the OHL's Kingston Frontenacs on July 12, 2006.On September 10, 2006, in a pre-season exhibition game between Kingston and the Ottawa 67's, Cassidy got the chance to coach against his former coach and mentor Kilrea; the Frontenacs lost 4–3, thanks to Ottawa's three-point men Matt Lahey and Thomas Kiriakou, who each had two goals and an assist.