Francis Joseph "Shag" Shaughnessy (April 8, 1883 – May 15, 1969) was an American athlete and sports executive.

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.

Shaughnessy had brief Major League baseball appearances with the Washington Senators in 1905 and the Philadelphia Athletics in 1908.

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.

[1][2] In spite of this, the forward pass was not officially allowed in Canadian football rules until 1929.