Horses in United States
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| Name | Last Run |
|---|---|
| Sir Ronaldo | Horseshoe Indianapolis, 13-Sep-23 |
| Sir Saffer | Tampa Bay Downs, 19-Mar-26 |
| Sir Sahib | Penn National, 21-Dec-24 |
| Sir Samuel | Woodbine, 21-Sep-24 |
| Sir Seamus | Woodbine, 26-May-24 |
| Sir Smoak | Charles Town, 05-Apr-24 |
| Sir Steele | Penn National, 29-Jul-23 |
| Sir Sterling | Oaklawn Park, 17-Apr-26 |
| Sir Terre | Presque Isle Downs, 17-Sep-24 |
| Sir Thomas Teal | Tampa Bay Downs, 04-Dec-25 |
| Sir Tibbs | Woodbine, 05-Jul-24 |
| Sir Tom | Sam Houston Race Park, 12-Jan-26 |
| Sir Tristan | Remington Park, 08-Nov-25 |
| Sir Vincent | Ellis Park, 18-Aug-25 |
| Sir Walta | Belmont At The Big A, 22-Sep-25 |
| Sir Walter Stoli | Remington Park, 24-May-25 |
| Sir Wellington | Oaklawn Park, 05-Apr-26 |
| Sir Xander | Horseshoe Indianapolis, 23-Oct-25 |
| Sir Zo | Del Mar, 04-Aug-25 |
| Sirani | Philadelphia Park, 11-Feb-25 |
| Sirdar | Delaware Park, 20-Jun-24 |
| Siren | Penn National, 01-Nov-24 |
| Sirenetta | Philadelphia Park, 02-Nov-23 |
| Sirgonzo | Penn National, 23-Mar-24 |
| Siringo | Will Rogers Downs, 05-Nov-25 |
| Sirius Light | Turfway Park, 11-Jan-26 |
| Sirius Pursuit | Aqueduct, 23-Jan-26 |
| Sirjus Dream | Mountaineer, 20-Nov-23 |
| Sirnami | Santa Anita, 08-Mar-26 |
| Sis Boom Bob | Fonner Park, 25-Apr-26 |
| Sis Spender | Sunray Park, 19-Apr-26 |
| Sisaway Now | Fonner Park, 05-May-24 |
| Sisk's Storm | Oaklawn Park, 22-Apr-24 |
| Sissinghurst | Deauville, 08-Aug-25 |
| Sissue | Fonner Park, 03-May-25 |
| Sissy Sox | Oaklawn Park, 26-Apr-26 |
| Sissy's May | Turfway Park, 28-Feb-25 |
| Sista Alice | Zia Park, 27-Nov-23 |
| Sister Annie | Saratoga, 24-Jul-23 |
| Sister Carlie | Oaklawn Park, 25-Apr-26 |
| Sister Cloudy | Delaware Park, 08-Sep-23 |
| Sister Code | Thistledown, 25-Jun-24 |
| Sister Cousin | Fort Erie, 30-Jul-24 |
| Sister Eagle | Lone Star Park, 20-Sep-25 |
| Sister Ella | Fonner Park, 20-Apr-26 |
| Sister Eve | Penn National, 09-Apr-26 |
| Sister Honey | Lone Star, 18-May-25 |
| Sister Hustle | Gulfstream, 19-Oct-25 |
| Sister Jean | Fair Grounds, 18-Feb-26 |
| Sister Joann | Mountaineer Park, 05-Dec-23 |
| Sister Kisses | Oaklawn Park, 22-Dec-24 |
| Sister Lily | Fair Grounds, 31-Jan-26 |
| Sister Linda | Aqueduct, 23-Feb-25 |
| Sister Lou Ann | Gulfstream, 02-Mar-25 |
| Sister Maha | Churchill Downs, 23-Sep-23 |
| Sister Marjorie | Gulfstream, 20-Dec-25 |
| Sister Mary Lou | Penn National, 14-Nov-25 |
| Sister Nell | Penn National, 26-Jul-25 |
| Sister Of Pearl | Deauville, 03-Feb-24 |
| Sister Otoole | Del Mar, 24-Nov-23 |