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| Name | Last Run |
|---|---|
| Xavi | Hawthorne, 03-Oct-25 |
| Xcaret | Fair Grounds, 21-Feb-25 |
| Xcellent Men | Monmouth Park, 19-Aug-24 |
| Xcellent Start | Charles Town, 12-Oct-25 |
| Xcellently Timed | Mountaineer, 26-Jun-23 |
| Xebec | Gawler, 25-Oct-19 |
| Xena | Oaklawn Park, 02-Feb-25 |
| Xenatown | Philadelphia Park, 04-Jul-23 |
| Xenon | Gulfstream, 13-Jun-25 |
| Xerces | Presque Isle Downs, 02-Oct-25 |
| Xerxes | Mahoning Valley, 10-Jan-24 |
| Xhilaratingpurpose | Mountaineer, 08-Sep-25 |
| Xiao Long | Colonial Downs, 14-Aug-25 |
| Xigera | Saratoga, 24-Aug-24 |
| Xit Now | Mountaineer, 20-Jun-23 |
| Xkuz | Oaklawn Park, 05-May-24 |
| Xmas Surprise | Del Mar, 29-Jul-23 |
| Xochil | Meadowlands, 12-Oct-25 |
| Xpensive Princess | Mountaineer, 21-Oct-24 |
| Xplosive | Will Rogers Downs, 01-Oct-25 |
| Xplosive Fire | Zia Park, 11-Dec-23 |
| Xpressir | Hawthorne, 24-Oct-25 |
| Xtended Streak | Mountaineer, 07-Aug-25 |
| Xtra Extraordinary | Keeneland, 13-Oct-24 |
| Xtra Spicy | Louisiana Downs, 24-Sep-24 |
| Xtrafine Xtina | Ferndale, 27-Aug-23 |
| Xtraordinarymotion | Mountaineer, 06-Aug-25 |
| Xtrasaucewelldone | Horseshoe Indianapolis, 30-Jul-24 |
| Xtreme Diva | Keeneland, 12-Oct-25 |
| Xtreme Mayhem | Turf Paradise, 01-May-25 |
| Xtreme Smoke Show | Keeneland, 06-Oct-25 |
| Xtreme V. I. P. | Turf Paradise, 02-Jan-23 |
| Xtremly | Sunland Park, 06-Jan-25 |
| Xy Face | Fonner Park, 04-May-25 |
| Xy Speed | Gulfstream, 27-Oct-25 |
| Xy Time | Tampa Bay Downs, 13-Feb-25 |
| Xylophone | Horseshoe Indianapolis, 23-May-24 |
| Xyngin Spitfire | Remington Park, 18-Oct-25 |
| Y U Unbridled | Fairmount Park, 01-Oct-25 |
| Y Vee R | Hastings Racecourse, 22-Sep-24 |
| Y'allreadyforthis | Colonial Downs, 07-Aug-25 |
| Y'zin Up | Charles Town, 24-Apr-25 |
| Ya Mar | Woodbine, 27-Apr-24 |
| Ya'll Come | Los Alamitos Racecourse, 13-Sep-25 |
| Yaani | Turfway Park, 15-Mar-25 |
| Yaas | Nottingham, 01-Aug-24 |
| Yabba Dabba Dude | Charles Town, 21-Mar-25 |
| Yacht Boy | Woodbine, 16-Dec-24 |
| Yacht Intentions | Presque Isle Downs, 20-May-25 |
| Yachtsmen | Charles Town, 06-Apr-24 |
| Yadi | Presque Isle Downs, 15-Oct-25 |
| Yadirayadirayadira | Gulfstream, 18-Aug-25 |
| Yaegiri | Niigata, 26-Oct-25 |
| Yah Huh | Finger Lakes, 21-Jun-23 |
| Yahmo | Colonial Downs, 13-Aug-24 |
| Yahoo Omar | Penn National, 30-Oct-25 |
| Yak | Lone Star Park, 27-Apr-24 |
| Yak Attack | Remington Park, 15-Nov-23 |
| Yakety Yock | Louisiana Downs, 01-Sep-24 |
| Yakozuki | Tampa Bay Downs, 01-Dec-24 |