Clarke MacArthur (born April 6, 1985) is a Canadian professional ice hockey left winger currently under contract for the Ottawa Senators of the National Hockey League (NHL), but he has not played a game since 2017 due to injury; technically, he is retired as of September 2018. MacArthur has previously played in the NHL with the Buffalo Sabres, Atlanta Thrashers and Toronto Maple Leafs. He was originally selected by Buffalo in the third round, 74th overall, at the 2003 NHL Entry Draft.