| Number of Mares Reported Bred to Thoroughbred Stallions in 2021 | |||||
| A B C D E F G H I J K L M N O P Q R S T U V W X Y Z | |||||
| Stallion | Mares Bred | State | |||
| Jac's Fact | 6 | OH | |||
| Jack Milton | 14 | KY | |||
| Jafmil | 1 | IA | |||
| Jagr | 15 | FL | |||
| James Street | 1 | CA | |||
| Jay Gatsby | 9 | LA | |||
| Jeranimo | 5 | CA | |||
| Jersey Town | 14 | CA | |||
| Jess's Dream | 43 | FL | |||
| Jimmy Creed | 120 | KY | |||
| Joe's Son Joey | 2 | LA | |||
| Joevia | 23 | NJ | |||
| Jonesboro | 2 | AR | |||
| Juba | 53 | WV | |||
| Just Howard | 5 | SC | |||
| Just in Seattle | 2 | WA | |||
| Justify | 167 | KY | |||