Reginald Joseph Leach is a Canadian former professional ice hockey right winger who played 13 seasons in the National Hockey League (NHL) for the Boston Bruins, California Golden Seals, Philadelphia Flyers, and Detroit Red Wings between 1970 and 1983. He is best known for his time in Philadelphia, winning a Stanley Cup with the Flyers in 1975 and being a member of the LCB line.