Dan "Big Dog" Ladouceur (born November 26, 1973 in Thunder Bay, Ontario) is a former lacrosse player. Ladouceur played ten seasons for the Toronto Rock in the National Lacrosse League, winning five championships, before retiring during the 2009 season. Outside of lacrosse, Ladouceur is a constable with the Durham Regional Police Service. On August 6, 2013, Ladouceur was announced as an assistant coach of the Toronto Rock, alongside Blaine Manning.