| Full name: | Sydney Groom Thayer |
| Born: | 7th July 1867, Wayne, Pennsylvania, United States of America |
| Died: | 9th July 1932, Haverford, Pennsylvania, United States of America |
| Relations: | Brother: GC Thayer; Brother: HC Thayer; Brother: JB Thayer; Brother: W Thayer; Nephew: JB Thayer; Son: SG Thayer |
| Teams: | Merion (Halifax Cup: 1883-1919); University of Pennsylvania (Miscellaneous: 1883-1884); All teams |
| Lists of matches and more detailed statistics | |