Leading North American Sires of 2019 Unrestricted First-Time SWs
(through 20 May 2019)
| Rank | Stallion | Sire | Location | SWs |
| 1 | CURLIN | SMART STRIKE | KY | 10 |
| 2 | TAPIT | PULPIT | KY | 8 |
| 3 | INTO MISCHIEF | HARLAN'S HOLIDAY | KY | 7 |
| 4 | SPEIGHTSTOWN | GONE WEST | KY | 5 |
| WAR FRONT | DANZIG | KY | 5 | |
| 6 | HARD SPUN | DANZIG | KY | 4 |
| SCAT DADDY | JOHANNESBURG | DEAD | 4 | |
| 8 | CANDY RIDE | RIDE THE RAILS | KY | 3 |
| ENGLISH CHANNEL | SMART STRIKE | KY | 3 | |
| MEDAGLIA D'ORO | EL PRADO | KY | 3 | |