Will Duffy
| Biographical details | |
|---|---|
| Born | November 24, 1888 Louisville, Kentucky, U.S. |
| Died | May 17, 1953 (aged 64) Buechel, Kentucky, U.S. |
| Playing career | |
| 1908–1910 | Central University |
| Coaching career (HC unless noted) | |
| 1911–1914 | Louisville Male HS (KY) |
| 1915–1916 | Louisville |
| Head coaching record | |
| Overall | 3–8–2 (college) |
William Michael Duffy (November 24, 1888 – May 17, 1953) was an American football player and coach. He served as the head football coach at the University of Louisville from 1915 to 1916, compiling a record of 3–8–2. Duffy died of a heart attack on May 17, 1953, while making a speech at St. Bartholomew Church in Buechel, Louisville.