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Edited Jockey Club Release — The Jockey Club today reported that 1,248 stallions covered 28,548 mares in North America during 2022, according to statistics compiled through October 8, 2023. These breedings have resulted in 18,143 live foals of 2023 being reported to The Jockey Club on Live Foal Reports.

The Jockey Club estimates that the number of live foals reported so far is 85-90 percent complete. The reporting of live foals of 2023 is down 2.5 percent from last year at this time when The Jockey Club had received reports for 18,609 live foals of 2022.

In addition to the 18,143 live foals of 2023 reported through October 8, The Jockey Club also received 2,018 No Foal Reports for the 2023 foaling season. Ultimately, the 2023 registered foal crop is projected to reach 18,500.

The number of stallions declined 4.2 percent from the 1,303 reported for 2021 at this time last year, while the number of mares bred declined 1.8 percent from the 29,065 reported for 2021.

The 2023 breeding statistics are available alphabetically by stallion name through the Resources – Fact Book link on The Jockey Club homepage at

Kentucky annually leads all states and provinces in terms of Thoroughbred breeding activity. Kentucky-based stallions accounted for 58.9 percent of the mares reported bred in North America in 2022 and 63.7 percent of the live foals reported for 2023.

The 16,827 mares reported bred to 208 Kentucky stallions in 2022 have produced 11,564 live foals, a 0.9 percent increase on the 11,460 Kentucky-sired live foals of 2022 reported at this time last year. The number of mares reported bred to Kentucky stallions in 2022 increased 0.2 percent compared to the 16,796 reported for 2021 at this time last year.

Among the 10 states and provinces with the most mares covered in 2022, four produced more live foals in 2023 than in 2022 as reported at this time last year: Kentucky, New York, Maryland, and Indiana.

The following table shows those 10 states and provinces with the most mares covered in 2022 sorted by number of state/province-sired live foals of 2023 reported through October 8, 2023.

 2022 Mares Bred2022 Live Foals2023 Live FoalsPercent Change in Live Foals
New York9875765902.4%

The statistics include 227 progeny, 46 more than in 2022, of stallions standing in North America but foaled abroad, as reported by foreign stud book authorities at the time of publication.

CountryLive FoalsCountryLive Foals
Australia2Republic of Korea49
Dominican Republic2Kingdom of Saudi Arabia71
Great Britain8Panama14

The report also includes 67 mares bred to 23 stallions in North America on Southern Hemisphere time; the majority of these mares have not foaled. In 2021, there were 50 mares bred to 19 stallions in North America on Southern Hemisphere time.

As customary, a report listing the number of mares bred in 2023 will be released later this month.

The Jockey Club, founded in 1894 and dedicated to the improvement of Thoroughbred breeding and racing, is the breed registry for North American Thoroughbreds. In fulfillment of its mission, The Jockey Club, directly or through subsidiaries, provides support and leadership on a wide range of important industry initiatives, and it serves the information and technology needs of owners, breeders, media, fans and farms. It founded America’s Best Racing (, the broad-based fan development initiative for Thoroughbred racing, and in partnership with the Thoroughbred Owners and Breeders Association, operates OwnerView (, the ownership resource. Additional information is available at

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