Reginald Alexander Sinclair (March 6, 1925 – November 14, 2013) was a Canadian professional ice hockey forward. He played in the National Hockey League (NHL) for the New York Rangers and Detroit Red Wings and was twice named to play in an NHL All-Star Game. Sinclair quit hockey in 1953 after only three NHL seasons to focus on a business career. He served as a vice-president of Pepsi and as president and partner of Maritime Beverages.