| Roles | Competed in Olympic Games |
|---|---|
| Sex | Male |
| Full name | William Joseph•Hennessy |
| Used name | William•Hennessy |
| Born | 25 September 1872 in Fitchburg, Massachusetts (USA) |
| Died | 30 July 1938 |
| NOC | United States |
William Hennessy wrestled three freestyle classes at the 1904 St. Louis Olympics. He lost in the semi-finals of all three classes but did not win any medals. Hennessy won one match as a lightweight and welterweight, but lost his only match as a heavyweight. He later became a veterinarian in Worcester, Massachusetts.
| Games | Discipline (Sport) / Event | NOC / Team | Pos | Medal | As | |
|---|---|---|---|---|---|---|
| 1904 Summer Olympics | Wrestling | USA |
William Hennessy | |||
| Lightweight, Freestyle, Men (Olympic) | AC r3/4 | |||||
| Welterweight, Freestyle, Men (Olympic) | AC r3/4 | |||||
| Heavyweight, Freestyle, Men (Olympic) | AC r2/3 |