| Name ▲ | Age | Gender | Owner | Actions |
|---|
| Xayabury | 5 | Colt | Gant's Farm | |
| Xcience Guy | 6 | Stallion | Hidden Oak Farm | |
| Xenophilius | 6 | Stallion | Stillwater Farms | |
| Xerxes | 10 | Gelding | Gant's Farm | |
| Xingjiao Temple | 6 | Mare | Ivy Creek Farm | |
| Xochimilco | 5 | Stallion | Gant's Farm | |
| Xray | 8 | Mare | Viscount Lodge | |
| Xylems | 5 | Mare | Gant's Farm | |
| Xylophone | 10 | Gelding | Final Furlong | |
| Yadkin | 4 | Stallion | Marshall Creek Ranch | |
| Yakety Yak | 10 | Stallion | Final Furlong | |
| Yankeetown | 5 | Stallion | Gant's Farm | |
| Yardbird | 6 | Mare | Fair Isle Farm | |
| Yarrow | 6 | Mare | New Boston Stables | |
| Ye Olden Days | 5 | Filly | Gant's Farm | |
| Yeats | 4 | Stallion | Kismet Thoroughbreds | |
| Yellow Furze | 7 | Mare | Gant's Farm | |
| Yellowcard | 2 | Colt | Denoux Stud | |
| Yellowhammer | 2 | Filly | Dreadnought | |
| Yellowjacket | 2 | Colt | Black Storm West | |