The 2006–07 OHL season was the 27th season of the Ontario Hockey League. The OHL announced, a new rule titled "Checking to the Head," effective for this season. Also announced, the recently adopted National Hockey League rule on stick curvature was not implemented until 2007–08. The season commenced on September 21, 2006, and twenty teams each played 68 games. The Sault Ste. Marie Greyhounds moved from Sault Memorial Gardens (demolished in May 2006) into the new Steelback Centre, which opened October 11, 2006. The Oshawa Generals moved mid-season from the Oshawa Civic Auditorium to the General Motors Centre, on November 3, 2006. The Plymouth Whalers won the J. Ross Robertson Cup defeating the Sudbury Wolves in the championship series.