Sam Day Jr.
| Personal information | |
|---|---|
| Born | 1818 |
| Died | 14 March 1838 (aged 19–20) |
| Occupation | Jockey |
| Horse racing career | |
| Sport | Horse racing |
| Major racing wins | |
| Major races St Leger (1837) | |
| Significant horses | |
| Mango | |
Sam Goddard Day (1818–1838), usually referred to as Sam Day Jr., was a British jockey who became the youngest winner of the St Leger when he won on Mango in 1837.