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| Name | Last Run |
|---|---|
| Unworkable | Horseshoe Indianapolis, 16-Oct-25 |
| Unwrapped | Turfway Park, 09-Feb-24 |
| Unwritten Code | Del Mar, 20-Jul-25 |
| Unxpected Tiger | Delaware Park, 16-Jun-24 |
| Unyielding | Mountaineer, 08-Oct-24 |
| Unzip Me Lord | Del Mar, 05-Aug-24 |
| Unzipped | Ellis Park, 07-Jul-24 |
| Uome | Mountaineer, 03-Sep-25 |
| Uottalikeit | Thistledown, 19-Sep-23 |
| Up A Lazy River | Los Alamitos Racecourse, 02-Nov-25 |
| Up Against It | Laurel Park, 18-Jan-25 |
| Up And Down | Keeneland, 08-Apr-24 |
| Up And Good | Lone Star Park, 05-Oct-25 |
| Up Country | Ellis Park, 23-Aug-25 |
| Up For Adventure | Finger Lakes, 21-Nov-23 |
| Up For It | Laurel Park, 03-Nov-25 |
| Up For The Chance | Mountaineer Park, 27-Nov-24 |
| Up For The Hunt | Del Mar, 08-Nov-25 |
| Up Her Sleeve | Mountaineer, 03-Nov-25 |
| Up In Arms | Mountaineer, 02-Dec-24 |
| Up In Flames | Laurel Park, 27-May-25 |
| Up In Time | Thistledown, 09-Sep-25 |
| Up N Gone | Fair Grounds, 24-Mar-25 |
| Up N Runnin | Penn National, 02-Aug-25 |
| Up N Up | Horseshoe Indianapolis, 07-Nov-24 |
| Up On The Edge | Keeneland, 13-Oct-25 |
| Up The Creek | Keeneland, 11-Oct-25 |
| Up The Odds | Horseshoe Indianapolis, 09-May-25 |
| Up To Forgive | Los Alamitos Racecourse, 13-Oct-25 |
| Up To Party | Lone Star Park, 26-Oct-25 |
| Up To Something | Turfway Park, 08-Feb-24 |
| Up To The Mark | Santa Anita, 05-Nov-23 |
| Up To Win | Turf Paradise, 04-Jan-23 |
| Up Up And Away | Lone Star, 26-Apr-25 |
| Upanoctavewildcat | Canterbury Park, 01-Sep-25 |
| Upbeat Melody | Fairmount Park, 23-Jul-25 |
| Upcharge | Santa Anita, 11-Oct-25 |
| Updraft | Santa Anita, 06-Oct-25 |
| Upfor Parole | Philadelphia Park, 05-Sep-23 |
| Upgrade Al | Mahoning Valley, 26-Jan-25 |
| Uphill Dance | Woodbine, 18-May-25 |
| Uphold | Horseshoe Indianapolis, 17-May-23 |
| Uphold The Law | Fair Grounds, 08-Jan-24 |
| Uplift | Los Alamitos Racecourse, 02-Nov-25 |
| Upo | Turf Paradise, 04-Apr-24 |
| Upon A Star | Belmont At The Big A, 16-Jun-25 |
| Upper Case | Turfway Park, 15-Dec-24 |
| Upper Level | Monmouth Park, 25-Jun-23 |
| Uppity Up | Presque Isle Downs, 08-Oct-25 |
| Upright | Golden Gate Fields, 26-May-24 |
| Upscuttled | Horseshoe Indianapolis, 07-Nov-25 |
| Upshot | Will Rogers Downs, 30-Sep-25 |
| Upside Potential | Turfway Park, 13-Feb-25 |
| Upsidedown Man | Colonial Downs, 23-Aug-25 |
| Upstanding | Gulfstream, 15-Mar-25 |
| Upstart Gentleman | Woodbine, 09-Dec-23 |
| Upstart Yankee | Santa Anita, 20-Oct-25 |
| Upstate And Back | Finger Lakes, 21-Aug-24 |
| Upstreet | Tampa Bay Downs, 13-Apr-25 |
| Upstriker | Assiniboia Downs, 14-Aug-25 |