| Full name: | Sydney Groom Thayer |
| Born: | 17th April 1897, Merion, Pennsylvania, United States of America |
| Died: | November 1972, Bryn Mawr, Philadelphia, Pennsylvania, United States of America |
| Relations: | Cousin: JB Thayer; Father: SG Thayer; Uncle: GC Thayer; Uncle: HC Thayer; Uncle: JB Thayer; Uncle: W Thayer |
| Teams: | Merion (Halifax Cup: 1920-1925); All teams |
| Lists of matches and more detailed statistics | |