| Name ▼ | Age | Gender | Owner | Actions |
|---|---|---|---|---|
| Sour Mine | 12 | Mare | Final Furlong | View |
| Sour Magic | 11 | Mare | Final Furlong | View |
| Sour Honor | 10 | Mare | Final Furlong | View |
| Sour Fish | 10 | Mare | Final Furlong | View |
| Sour Edge | 13 | Mare | Final Furlong | View |
| Sour Decision | 9 | Mare | AllegroThoroughbreds | View |
| Sour Coach | 9 | Mare | Final Furlong | View |
| Sour City | 22 | Mare | Final Furlong | View |
| Sour Cave | 7 | Mare | Black Briar Stables | View |
| Soupy | 18 | Mare | Cricket Hill | View |
| Sounder | 8 | Mare | Final Furlong | View |
| Soulstruck | 12 | Mare | Marshall Creek Ranch | View |
| Soul Trader | 11 | Mare | Final Furlong | View |
| Soul Surfer | 14 | Mare | Final Furlong | View |
| Soul Queen | 10 | Mare | AllegroThoroughbreds | View |
| Sorrow's Soulmate | 20 | Mare | Final Furlong | View |
| Sorority Gal | 16 | Mare | Backcheck Farms | View |
| Sorority Fight | 15 | Mare | Final Furlong | View |
| Sorcha | 17 | Mare | Tall Oaks Farm | View |
| Sorcerer's Phoenix | 13 | Mare | Marshall Creek Ranch | View |