High Quality Content by WIKIPEDIA articles! Mixed Martial Arts (MMA) in Ontario has been considered illegal until August 14, 2010, when the Ontario government announced that they would be moving forward to allow professional mixed martial arts in the province. This was seen as a sudden change in direction as the government has been reluctant to allow MMA events to be held. This paved the way for the largest regulated professional MMA event, UFC 129, which was held on April 30, 2011 at the Rogers Centre in Toronto.