| Tiresias | |
|---|---|
&sq=Envato&lang=en&file=File:Tiresias_Derby_winner.jpg) Tiresias with jockey and trainer. Engraving by James Pollard. | |
| Sire | Soothsayer |
| Grandsire | Sorcerer |
| Dam | Pledge |
| Damsire | Waxy |
| Sex | Stallion |
| Foaled | 1816 |
| Country | United Kingdom of Great Britain and Ireland |
| Colour | Brown |
| Breeder | William Bentinck, 4th Duke of Portland |
| Owner | Duke of Portland |
| Record | 13:11-2-0 |
| Major wins | |
| Newmarket Stakes (1819) Epsom Derby (1819) Newmarket St Leger (1819) Audley End Stakes (1819) | |
Tiresias (1816–1837) was a British Thoroughbred racehorse and sire. In a career that lasted from April 1819 to July 1820 he ran thirteen times, all but two of them at Newmarket and won eleven races. Both of his defeats came when he was attempting to concede weight to opponents in match races. His most important win came in May 1819 when he won the Derby. Tiresias's racing career was ended by injury in the summer of 1820, after which he was retired to stud.