Francis Joseph "Shag" Shaughnessy (April 8, 1884 – May 15, 1969) was an American athlete and sports executive. Shaughnessy played both baseball and football and was an executive in baseball, football and ice hockey. He was born in the United States and moved to Canada in the 1910s, where he was involved with football and ice hockey teams in Montreal and Ottawa. He was later president of the International League of baseball. His son Frank Shaughnessy, Jr. also played football and ice hockey, and played ice hockey for the United States in the 1936 Winter Olympics.
Shaughnessy was the first professional coach hired in Canadian university football and his full-time appointment at Montreal's McGill University in 1912 was not well received by the other teams in the league.
In each of his first two years, McGill won the Yates Cup football championship. He coached McGill to a 34-34-2 regular season record in 17 seasons. The 34 victories stood until 1979 as the most by a McGill football coach.
Shaughnessy played baseball during the summer in Ottawa, where he met his wife. He became involved in Ottawa sports, and was coach of the Ottawa Rough Riders for the 1915 season.
A football innovator, Shaughnessy introduced the forward pass to Canadian university football when McGill played Syracuse University in an experimental game held on November 5, 1921 at Percival Molson Memorial Stadium in Montreal. In spite of this, the forward pass was not officially allowed in Canadian football rules until 1929. He was the first football coach in Canada to introduce "X" and "Y" strategic formations and "secondary defence".
In 1969, the Shaughnessy Cup was first presented for local football supremacy between McGill and Loyola College. Since 1975, the Cup has been fought for in an annual challenge match between McGill and Concordia University.
While living in Ottawa, Shaughnessy served from 1914 until 1916 as the manager of the Ottawa Senators.
Shaughnessy coached the McGill women's hockey team and was appointed men's hockey coach in 1919, guiding the Redmen to a 61-56-2 record until stepping down in 1927. The 61 victories established a McGill record and since then, has only been surpassed by four other McGill hockey coaches.