| Roles | Competed in Olympic Games (non-medal events) |
|---|---|
| Sex | Male |
| Full name | William Thompson•Haydock |
| Used name | William•Haydock |
| Born | 11 November 1889 in St. Louis, Missouri (USA) |
| Died | 21 October 1979 (aged 89 years 11 months 10 days) in Laguna Niguel, California (USA) |
| Affiliations | Arlington School |
| NOC |  United States |
| Games | Discipline (Sport) / Event | NOC / Team | Pos | Medal | As | |
|---|---|---|---|---|---|---|
| 1904 Summer Olympics | Athletics | USA |
William Haydock | |||
| 220 yards, Boys (Olympic (non-medal)) | 2 | |||||
| 440 yards, Boys (Olympic (non-medal)) | 2 |
