| Name ▲ | Age | Gender | Owner | Actions |
|---|
| Xanthein | 11 | Mare | Gant's Farm | |
| Xayoo | 5 | Mare | Clicker Lab | |
| Xenolith | 11 | Mare | Gant's Farm | |
| Xerophilous | 13 | Mare | Gant's Farm | |
| Xerophyte | 11 | Mare | Gant's Farm | |
| Xerosere | 11 | Mare | Gant's Farm | |
| Xile | 13 | Stallion | Final Furlong | |
| Xiphidium | 11 | Mare | Gant's Farm | |
| Xiphium | 6 | Mare | Rainee Thoroughbreds | |
| Xiuxiuejat | 11 | Gelding | Clicker Lab | |
| Xotic Seed | 5 | Mare | Clicker Lab | |
| Xoxoxo | 10 | Gelding | Clicker Lab | |
| Xplicit | 18 | Gelding | Final Furlong | |
| Xplicit Glam | 10 | Mare | Clicker Lab | |
| Xspeedious | 15 | Stallion | Final Furlong | |
| Xylyl | 11 | Mare | Gant's Farm | |
| Xyzzy | 9 | Gelding | Clicker Lab | |
| Y'all | 10 | Mare | Clicker Lab | |
| Yacht Club | 12 | Stallion | Final Furlong | |
| Yaletha | 7 | Mare | Clicker Lab | |